On Tuesday, the full cast of DWTS season 22 was announced on Good Morning America, revealing The O.C.'s very own Mischa Barton will compete for the Mirrorball trophy.
"I know it will push me to my limits, both emotionally and physically," Barton, 30, says in the current issue of PEOPLE. "You always learn something about yourself by doing that."
The actress also says she reached out to Rumer Willis, 27, who won season 20 with her partner Val Chmerkovskiy. (As it turns out, Barton actually met Rumer back when she played the dead girl under the bed in the 1999 horror film The Sixth Sense, starring Rumer's dad, Bruce Willis.)
"I reached out to Rumer before signing on for the show," Barton says. "She told me, 'You are going to have the best time. It's like family.' And that's exactly what it's been like so far."
VIDEO: Rumer Has It! Rumer Willis Wins Dancing With The Stars
As for what Barton hopes to get out of the experience?
"You always learn something about yourself when developing a new skill," she says. "I'm going to learn plenty because you physically and emotionally are pushing yourself to your limits and that's both terrifying and amazing."
"When we first saw the pros dance I was like, 'Oh my God! I'm never going to be that good. Let's be real,' " she adds. "But it will be an interesting transformation."
Season 22 of Dancing with the Stars premieres March 21 on ABC.