Robert Pattinson and Katy Perry Spotted Out Together in Los Angeles Before His Birthday (Report)

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Robert Pattinson and Katy Perry were seen partying together ahead of his birthday in Los Angeles at the Chateau Marmont on May 9 according to HollywoodLife.com.

Pattinson and Perry reportedly arrived around 10 p.m. and stayed until after 2 a.m. Pattinson's girlfriend was not seen with the pair, but she reportedly has some big plans for his birthday.

"Kristen is super excited to totally spoil Rob on his birthday. Kristen has a special day and night planned for Rob, which will include swimming, friends, music, and of course their dogs Bear and Bernie," a source told HollywoodLife.com. "She’s not revealing too many details because she wants it to be a surprise for him. She just wants to totally shower him with love and affection."

Pattinson's 27th birthday is today, May 13.