Pop singer Lily Allen has been tipped to star in hit British TV show Doctor Who. The Smile hitmaker, 22 - who will present her own BBC talk show early next year (08) - is hoping to expand her small-screen career by playing Doctor Who's assistant, a role currently portrayed by comedienne Catherine Tate. A show source tells British newspaper The Sun, "Lily is multi-talented. She comes from more of a TV background than a musical one. After (her) chat show we hope she'll take over from Catherine as Dr Who's assistant. "We've talked to her and she was excited by the idea. With Lily and someone younger and edgier in the lead role it could open up the show to a new trendier crowd."