Heidi Swedberg is an American actress and musician, best known for playing Susan Ross, the fiancée of George Costanza, on the television sitcom Seinfeld.

She also had guest roles in a number of television series, including Matlock, Thirtysomething, Quantum Leap, Brooklyn Bridge, Northern Exposure, Sisters, Roc and Touched by an Angel.

Swedberg appeared regularly in other television shows, including Empty Nest, Murder, She Wrote, Star Trek: Deep Space Nine, and Grace Under Fire.

After acting, Heidi taught music at Saint Brendan Elementary School in the Los Angeles Hancock Park neighborhood.

Swedberg appears at ukulele festivals and nightclubs with her other band, The Smoking Jackets, with multi-instrumentalists Daniel Ward, Craig McClelland and John Bartlit.