Alison Bartlett-O'Reilly (born July 14, 1971) is an American actress best known for portraying Gina Jefferson on Sesame Street. She played the character on an on-and-off basis in 1985, and became a regular in November 1987. Bartlett-O'Reilly has acted on Broadway, most notably in the original Broadway production of Hurlyburly.
Sometimes credited as Alison Bartlett, she is married to actor Harry O'Reilly; the couple has three children. Her mother is musical theatre actress D'Jamin Bartlett. Bartlett-O'Reilly is also a real estate agent for Halstead in Riverdale, New York.