Melora Diane Hardin Jackson (born June 29, 1967[1]) is an American actress and singer best known for her roles as Jan Levinson on NBC's The Office, Trudy Monk on USA Network's Monk, and Tammy Cashman on Amazon Prime Video's Transparent, for which she received a Primetime Emmy Award nomination.

She starred as Baby in the short-lived 1988 television series Dirty Dancing (based on the 1987 film of the same name) and two 1992 episodes of Quantum Leap (as Abigail in "Trilogy", Parts 2 and 3).

She appeared in Absolute Power (1997) as Christy Sullivan and played Ross's dirty-talking love interest in the season 1 Friends episode "The One with the Stoned Guy".

She was also originally cast in Back to the Future (1985) as Jennifer Parker alongside Eric Stoltz, who starred as Marty McFly.

[9][10] Hardin played Jan Levinson in The Office (2005–2013), a former corporate manager and love interest of Michael Scott.

Hardin sang the U.S. national anthem at the Anaheim Ducks’ season-opening hockey game on October 13, 2010,[15] and for the Phoenix Coyotes three days later.