Film and stage actor, improviser and writer Mark David Christenson is one of the very few men to ever embrace Sean “Diddy” Combs. He has been performing since the eighth grade and trained with Frank Gerrish for several years in Salt Lake City. He made his film debut in the Mormon film The RM and has starred in White on Rice (the debut film of award winning filmmaker Dave Boyle), the indie film Feeding Mr. Baldwin and appeared on Conan and Jimmy Kimmel Live!

Since moving to Los Angeles, MDC has trained with acting coach John Kirby, several instructors at the Upright Citizens Brigade, Killian McHugh, Toby Lawless, Annie Grindlay and currently in on-going actor training at John Rosenfeld Studios with instructor Ryan Garcia. Along with classes in the UCB Advanced program, he has been a regular cast member on the UCB Maude team The Space Program, performed on UCB Harold Night for three years with teams Mister Town City and Landlord, starred as George Costanza in the sold out hit Seinfeld: The Purge, an officer who loses everything in Squeeze Academy and co-hosted/co-prodcued Spoiler Country and is currently part of the regular cast for the monthly shows Copycat and Small Town at UCBTLA.

Mark David Christenson also co-founded/co-hosted a weekly improv show The Manifesto Show for five years, self-produced and hosted the podcast I Will Watch Anything Once for 3 years.