Judd Asher Nelson (born November 28, 1959) is an American actor. He is best known for his roles as John Bender in The Breakfast Club, Alec Newbury in St. Elmo's Fire, Joe Hunt in Billionaire Boys Club, Nick Peretti in New Jack City, Billy Beretti in Empire, and Jack Richmond in the television series Suddenly Susan.

Early life
Nelson was born in Portland, Maine, the son of Merle (née Royte), a court mediator and former member of the Maine House of Representatives, and Leonard Nelson, a corporate lawyer. His family is Jewish. His father was the first Jewish president of the Portland Symphony Orchestra. He has two sisters, Eve and Julie.

He went to school at St. Paul's School in Concord, New Hampshire and Waynflete School in Portland, Maine. He studied at Haverford College in Pennsylvania, leaving during his sophomore year. He subsequently moved to Manhattan to study acting with Stella Adler.