Jami Beth Gertz (born October 28, 1965) is an American actress. Gertz is known for her early roles in the film The Lost Boys, Quicksilver, Less Than Zero, the short-lived 1980s TV series Square Pegs with Sarah Jessica Parker, as well as the 2000s CBS sitcom Still Standing with Mark Addy.
Gertz made her film debut (as did Tom Cruise) in the 1981 romance film Endless Love and then appeared in the teen movie Sixteen Candles in 1984. She gained attention with a starring role in 1987's Less Than Zero, as the friend of a doomed drug addict played by Robert Downey, Jr..
Gertz had a key supporting role in the 1996 blockbuster Twister after other films including 1986's Solarbabies and Crossroads and 1992's Jersey Girl. In a 1994 episode of Seinfeld she appeared as a girlfriend of Jerry who worked as a phone sex operator but claimed to sell office supplies. (She couldn't "spare a square" to Elaine in the restroom.) Gertz later played the recurring character Dr. Nina Pomerantz during the 1997 season of ER.