Mark L. Walberg is an American actor and comic best known for hosting the PBS version of Antiques Roadshow.
Previously, he was the host on the game shows Temptation Island, Free 4 All, The Big Date, Russian Roulette, and On The Cover.
He was also an announcer and sidekick on the TV series Shop 'Til You Drop from 1991 to 1994. For a brief time he hosted his own talk show.
He was also the host of the game show The Moment of Truth.
He is not to be confused with actor Mark Wahlberg.