Mary-Kate and Ashley Olsen may still join Full House revival Fuller House.

The 29-year-old sisters, known collectively as the Olsen twins, portrayed Michelle Tanner on the original ABC sitcom. Netflix chief content officer Ted Sarandos revealed the actresses have yet to decide if they will join the new streaming series.

"The Olsen twins are teetering [on] whether or not they'll be around," he told reporters at the Television Critics Association's semi-annual press tour Tuesday. "There's a bunch of opportunity for them if they choose to. But they're not in the current creative."

Candace Cameron Bure, Bob Saget, John Stamos, Lori Loughlin, Dave Coulier, Jodie Sweetin and Andrea Barber are confirmed to return. Executive producer Robert L. Boyett said the Olsen sisters would not take part in the revival in May.

Fuller House began filming this week, and will premiere a 13-episode first season in 2016. The show will focus on an adult, pregnant and newly-widowed D.J. Tanner (Bure) as she raises her two children with the help of sister Stephanie (Sweetin) and best friend Kimmy (Barber).