English actress Billie Piper regrets her decision to quit BBC show Doctor Who after just two series.
Piper, who played the Doctor's sidekick Rose in the hit show, admits she's "jealous" of Doctor Who's continued success.
She says: "I still desperately miss Rose and everyone at Doctor Who. I'm jealous that I'm no longer part of it and I'm trying to keep the green-eyed monster at bay, but on the whole it felt like the right thing to do.
"I'd done two series, and each on takes nine months to shoot. I got so close to everybody that I thought if I didn't ever leave I'd be too scared to ever go, and I'd get complacent."