Ashley Olsen, Mary-Kate Olsen, Bob Saget, and Jodie Sweetin in Full House (1987)

Ashley Olsen and Mary-Kate Olsen in Full House (1987)

Ashley Olsen and Mary-Kate Olsen in Saturday Night Live (1975)

Ashley Olsen and Mary-Kate Olsen in ABC TGIF (1989)

Ashley Olsen, Mary-Kate Olsen, and Nick Bakay in ABC TGIF (1989)

Ashley Olsen, Mary-Kate Olsen, and Bob Saget in Full House (1987)

Ashley Olsen and Mary-Kate Olsen in Double, Double Toil and Trouble (1993)

Ashley Olsen and Mary-Kate Olsen in Two of a Kind (1998)

Ashley Olsen and Mary-Kate Olsen in Switching Goals (1999)

Ashley Olsen, Mary-Kate Olsen, and Eric Lutes in Switching Goals (1999)

Mary-Kate Olsen and Jake LeDoux in Switching Goals (1999)

Mary-Kate Olsen, Robert Clark, Keith Knight, and Jesse Farb in Switching Goals (1999)

Ashley Olsen, Mary-Kate Olsen, Jesse Lee Soffer, and Christopher Sieber in Two of a Kind (1998)

Mary-Kate Olsen and Tahj Mowry in Full House (1987)

Kirstie Alley, Steve Guttenberg, Ashley Olsen, Mary-Kate Olsen, and Jane Sibbett in It Takes Two (1995)

Ashley Olsen and Mary-Kate Olsen in So Little Time (2001)

Ashley Olsen, Mary-Kate Olsen, John Stamos, Candace Cameron Bure, Dave Coulier, and Jodie Sweetin in Full House (1987)

Mary-Kate Olsen, John Stamos, Candace Cameron Bure, Dave Coulier, Lori Loughlin, Bob Saget, and Jodie Sweetin in Full House (1987)

Ashley Olsen, Mary-Kate Olsen, John Stamos, Andrea Barber, Candace Cameron Bure, Dave Coulier, Lori Loughlin, Bob Saget, Jodie Sweetin, Blake Tuomy-Wilhoit, Dylan Tuomy-Wilhoit, and Scott Weinger in Full House (1987)