She played Annie Whitman on ABC's Life as We Know It. Darr's previous television appearances include the 1991 short-lived sitcom Flesh 'n' Blood as Rachel Brennan, The WB's teenage drama Popular as Jane McPherson, as well as the short-lived but critically acclaimed 1996 Fox series Profit as Gail Koner. In the fifth season of the sitcom Ellen, she played Laurie Manning, the girlfriend of the title character Ellen Morgan; In "Four for the Seasaw", an epsidode of Frasier, she and Megan Mullally played love interests for the Crane brothers. She played archaeologist Ginny Will on an episode of Quantum Leap.