Mark Harmon’s acting talent has earned him multiple Emmy Award and Golden Globe Award nominations. He was nominated for an Emmy for Outstanding Guest Actor in a Drama Series for “The West Wing” and for Outstanding Supporting Actor in a Drama Special for the movie “Eleanor and Franklin: The White House Years.” He received two consecutive Golden Globe nominations for his work in “Reasonable Doubts,” and received Golden Globe nominations for Best Performance by an Actor in a Motion Picture Made for TV for “After the Promise” and for his role as serial killer Ted Bundy in “The Deliberate Stranger.” Along with his co-stars in “Chicago Hope,” on the Network, Harmon received two SAG Award nominations for ensemble work. While on the show, he directed episodes of the program. In 2017 Harmon was awarded the People’s Choice Award for Favorite Crime Drama TV Actor.

To kick off the 10th season of NCIS, Harmon was honored with a star on the Hollywood Walk of Fame. During the 11th season, he worked closely with showrunner Gary Glasberg on a special two episode arc in which Gibbs was reunited with an old comrade for a case in New Orleans. The episodes were developed into the NCIS: NEW ORLEANS planted spinoff for the Network.

Harmon developed, executive produced and starred in “Certain Prey,” an original movie for USA Network. Based on the series of Prey books, Harmon portrayed Minneapolis Deputy Police Chief Lucas Davenport.

His additional television credits include the miniseries “From the Earth to the Moon,” the CBS miniseries “And Never Let Her Go,” the movie “Sweet Bird of Youth,” and the series “St. Elsewhere” and “Moonlighting.”

Harmon’s feature film credits include “Weather Girl,” “Freaky Friday,” “Chasing Liberty,” “Comes a Horseman,” “Wyatt Earp,” “Stealing Home,” “The Presidio,” “Summer School,” “Fear and Loathing in Las Vegas,” “Natural Born Killers” and “The Last Supper.” Also, Harmon lent his voice to the character of Superman in “Justice League: Crisis on Two Earths.”

On stage, Harmon appeared in “Key Exchange,” “Wrestlers,” “The Wager” and several productions of “Love Letters” with his wife, actress Pam Dawber.

Harmon was born and raised in Southern California, where he attended UCLA and quarterbacked the football team to several winning seasons, for which he was awarded the National Collegiate Football Foundation Award for All-Around Excellence. He is a cum laude graduate of UCLA with a degree in communications. His father, Tom Harmon, was a Heisman Trophy winner and nationally acclaimed broadcaster. His mother was actress Elyse Knox.

Sean Murray’s television credits include “Touched by an Angel” and “JAG” on the Network, “Harts of the West,” “Boston Public,” “ER,” and his television debut, the movie “Backfield in Motion.”

His film credits include “Hocus Pocus,” “This Boy’s Life” and “Too Romantic.”

Sean was born in the Bethesda Navy Hospital in Maryland and grew up on several military bases all over the world. His father is a retired Navy Captain with over 30 years of service, and his Australian mother holds a dual citizenship with the United States. Murray lives in Los Angeles with his family. His birthday is Nov. 15. Follow him on Twitter @SeanHMurray and on Instagram @therealseanhmurray.

Emily Wickersham’s television credits include “The Sopranos,” “The Bridge,” “Gossip Girl,” “Law & Order: Criminal Intent,” “Trauma” and “Bored to Death.”

Her feature film credits include “Gone,” “I Am Number Four,” “Remember Me,” “Definitely, Maybe” and “Friend Zone.”

Born in Mamaroneck, N.Y., Wickersham now lives in Los Angeles. Her birthday is April 26. Follow her on Twitter @EmilyWickersham.

Actor, producer and activist Wilmer Valderrama has been making audiences laugh, listen and think for nearly two decades. He’s perhaps most recognized for his role as Fez, an exchange student, on the Emmy Award-nominated series “That ‘70s Show,” for which he garnered several Teen Choice Awards.

Valderrama’s additional television credits include starring roles in “Minority Report,” “From Dusk Till Dawn” and “Awake,” and guest roles in “The Ranch,” “Grey’s Anatomy,” “Raising Hope,” “Suburgatory,” “Royal Pains” and “Wizards of Waverly Place.” Also, he voiced the character of Manny in the animated children’s program “Handy Mandy.”

Valderrama’s feature film credits include the indie films “The Girl Is in Trouble,” “To Whom It May Concern” and “The Adderall Diaries.” His additional film credits include “Larry Crowne,” “From Prada to Nada” and “Fast Food Nation.”

Behind the camera, Valderrama created and produced the series “Yo Momma,” in addition to hosting the show for three seasons. Also, he produced “Punk’d,” “Blowin’ Up” and “Trippin.” Currently, his production company, WV Enterprises, has multiple projects in development, including the feature film “Charming” set to be released next year. The company also produced the series “The Hollywood Puppet S!itshow” which premiered in summer 2017 and will debut its second season later this year.

Valderrama is active in several philanthropic agencies. Most recently, Valderrama, along with America Ferrera and Ryan Piers Williams, started Harness, a group dedicated to connecting communities through conversation to inspire action and power change. In addition, Valderrama serves on the board of Voto Latino and is co-chair of their artist coalition. He is also the spokesperson for CHCI, the Congressional Hispanic Caucus Institute, and is the founder of their Ready 2 Lead program, which educates and empowers the Latino youth. In 2013 Valderrama was honored with an ALMA Award for Outstanding Social Activism.

Born in Miami and raised in Venezuela from the ages of 3 to 13, Valderrama is fluent in Spanish and English. His family relocated to Los Angeles, where he currently resides. His birthday is Jan. 30. Follow him on Twitter @WValderrama and on Instagram@wilmervalderrama.

Maria Bello has established herself as a leading actress with her many diverse roles in dozens of films, including “The Cooler,” with William H. Macy, which earned her Golden Globe and Screen Actors Guild Award nominations; David Cronenberg’s “A History of Violence,” opposite Viggo Mortensen and Ed Harris, which earned her a New York Film Critics Circle Award and a Golden Globe Award nomination; Oliver Stone’s “World Trade Center”; and “Prisoners,” opposite Hugh Jackman. Most recently, Bello appeared in the hit James Wan thriller “Lights Out” and the original series “Goliath,” with Billy Bob Thornton and William Hurt.

Bello executive produced and starred in the films “In Search of Fellini,” “The Journey Is the Destination,” “GLO” and “Exit.” She created and produced the virtual reality piece “The Sun Ladies,” which had its world premiere at Sundance. Currently, she is producing the film “The Woman King,” starring Viola Davis and Lupita Nyong’o, which is based on her original concept.

Bello’s television credits include starring roles in “Prime Suspect,” “ER” and the TV movie “Big Driver,” based on the Stephen King short story.

In April 2015, Bello released her first book, Whatever… Love Is Love, in which she expanded on her news-making “Coming Out as a Modern Family” column that ran in the New York Times in 2013. The book explores themes and ideas surrounding family, partnership, sexuality and spirituality.

Bello is an internationally renowned activist and is a powerful voice for social justice and women’s rights around the world. Her career as an activist began at Villanova University, where she majored in peace and justice education and worked at the Women’s Law Project in Philadelphia. In 2009 Bello was voted one of Variety’s most powerful women in Hollywood for her activism with women in Darfur, and she continues to speak around the country on women’s rights, equality and social impact investing at venues such as TedWomen, the U.N. and the State Department.

Bello lives in Los Angeles with her son, Jackson. Her birthday is April 18. Besides her son, her greatest passion is travel. She can be followed on Twitter @Maria_Bello and Instagram @officialmariabello.

Brian Dietzen started his acting career on the stage in his hometown of Boulder, Colo. He performed with the Colorado Shakespeare Festival and graduated from the University of Colorado at Boulder, majoring in acting.

His television credits include “My Guide to Becoming a Rockstar,” “Boston Public,” and “One on One.”

Dietzen co-wrote, produced and starred in the feature film “Congratulations,” which was selected by over a dozen film festivals and won best feature awards from United Film Festival and New Filmmakers. Currently, Dietzen is producing a documentary that follows the Wounded Warrior Amputee softball team and the children who attend their annual camp. Also, he completed his latest feature film script, which will go into production next year.

His additional film credits include “From Justin to Kelly” and “Karaokeman.”

Dietzen lives in Los Angeles with his wife and two children. His birthday is Nov. 14. Follow him on Twitter @BrianDietzen and Instagram @briankdietzen.

Diona Reasonover is an actor, writer and improv performer who received an undergraduate degree in theater and dance from Oberlin College and a master’s degree in acting from the prestigious California Institute of the Arts.

An alumna of the CBS Diversity Showcase, Reasonover wrote and performed in the 2014 performance and was the head writer in 2015.

Reasonover’s television credits include “2 Broke Girls,” on the Network, as well as “Clipped,” “Grace and Frankie,” “Superstore,” “Girl Meets World” and “Comedy Bang! Bang!”

Her feature film credits include “The Night Watchmen.”

Reasonover’s writing credits include the Emmy-nominated “I Love You, America,” “I Love Dick” and “Adam Ruins Everything.”

Born in Detroit, Mich., Reasonover now lives in Los Angeles. Her birthday is Jan. 6. Follow her on Twitter and Instagram @DionaReasonover.

A theater, television and feature film star, Carroll joined the NCIS cast in 2008, where he was reunited with his former “Chicago Hope” co-star, Mark Harmon.

Carroll’s additional television credits include “Grey’s Anatomy,” “Boston Legal,” “ER,” “Roc” and a starring role on the Network’s “The Agency.” Recently, Carroll starred opposite Oprah Winfrey in “The Immortal Life of Henrietta Lacks.”

On the big screen, his credits include “Yes Man,” “Prisoner” and “The Ladies Man.”

On the stage, Carroll was Tony-nominated for August Wilson’s “The Piano Lesson” and starred in a national tour of Wilson’s play “Radio Golf” in 2005. Also, Carroll starred in “Fraternity” for the Ebony Rep Theatre Company.

Carroll added directing to his resume when he directed his first episode of NCIS during the 2014-2015 season. Since then, he has directed seven episodes of the series.

Born in Cincinnati, Carroll now lives in Los Angeles with his wife and daughter. His birthday is July 8. Follow him on Twitter at @RockyCOfficial.

David McCallum was born in Scotland in 1933. He joined Actors’ Equity in 1946 when he began working on BBC Radio, followed by several years in repertory theater.

His many theater productions include “Amadeus,” “Communicating Doors,” “The Hunting of the Snark,” “Comedians,” “The Lion in Winter” and “Julius Caesar.”

After moving to America in 1961, he was cast in the role of Illya Kuryakin in the television series “The Man from U.N.C.L.E.,” for which he received two Emmy Award nominations. His additional television credits include “The Education of Max Bickford,” on the Network, “Sapphire and Steel,” “Colditz,” “Trainer,” “VR5,” “Motherlove,” “Kidnapped,” “The Invisible Man,” and episodes of “The Outer Limits,” “Law & Order” and “Sex and the City.”

His feature film credits include “The Greatest Story Ever Told,” “The Great Escape,” “Mosquito Squadron,” “Billy Budd,” “Freud” and “A Night to Remember.”

In the Disney animated series “The Replacements,” he is the voice of the very unconventional family car. Also, he can be heard in the Cartoon Network series “Ben 10” and in more than 30 books on tape and CD.

In 2016 McCallum published his first novel, Once a Crooked Man.

McCallum lives in New York with his wife, Katherine, an interior designer. His birthday is Sept. 19.