Perry and Pattinson at after-party

Katy Perry and Robert Pattinson have sent the rumour mill into overdrive after being spotted at an after-party.

Katy Perry has been spotted out with Robert Pattinson
Katy Perry has been spotted out with Robert Pattinson

The pair - who previously labelled themselves as "close friends" - left tongues wagging after they were reported to be getting cosy at a wrap party for Rob's new film The Rover.

An onlooker told Radar Online that "when Rob saw Katy his eyes lit up". The 28-year-old Twilight actor even reportedly resisted the advances from other ladies throughout the night.

According to the insider, the Roar hit-maker "looked gorgeous in a lace sequin black mini-dress".

They added: "At least 10 hotties were hovering around Rob, but his focus was on Katy."

Robert had a high profile break-up with his Twilight co-star Kristen Stewart last year, while Katy ended her on/off relationship to fellow singer John Mayer amid claims he cheated on her.

Since then, the 29-year-old pop star has been linked to Florence And The Machine guitarist Robert Ackroyd, and Major Lazer's Diplo.

Meanwhile, R-Patz is said to be currently dating LA-based model Imogen Kerr, but during a recent interview with Entertainment Tonight, he claimed he is still single.

Talking about his love life, he dismissed the various dating rumours and said: "No [I'm not seeing anyone]."

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