Katy Perry and Robert Ackroyd Pictures in London

Katy Perry left the Dove pub in London with her on-again boyfriend yesterday. She and Robert Ackroyd, who is the guitarist for Florence + the Machine, met up with friends for a night on the town that included a stop by the Market Cafe. Katy and Rob are apparently back together after being spotted showing PDA at Coachella in April.

Katy is traveling to promote her forthcoming documentary, Part of Me, which will be released on July 5. She stopped by the Graham Norton Show to chat up the film and even made a surprise appearance at a special screening with fans earlier in the day. Katy may be switching gears to the big screen, but she's still getting recognition for her musical work and was honored at the Billboard Awards last month.