Twilight hunk Robert Pattinson is staying unattached and keeping it casual after having his heart crushed by ex-girlfriend/co-star Kristen Stewart earlier this year. 

Perezhiliton.com reported on Aug. 2 that a source close to Pattinson and his current hookup Riley Keough said the duo are "hooking up and having fun."

Keough's mom, Lisa Marie Presley, actually set up the two lust birds. Presley reportedly got her daughter a date not long after Pattinson and Stewart split, and the two apparently hit it off. 

A source told Perezhilton.com, "[Riley's] the first girl he's liked since Kristen. [They're] having a lot of fun."

Pattinson was also rumored to be hooking up with pop star Katy Perry, but she cleared those rumors really quick in an interview with ELLE UK's September issue. 

Perry claims she texted Stewart to clear the air saying, "I sent her a text message saying, 'I know you've seen all this stuff but you know I would never disrespect you. I'm not that person...I'm just trying to be a friend to him but it is unfortunate that I do have a set of t*ts.'" 

Perry and Pattinson have been linked together a lot recently, including the time the pair made their first public appearance together, without Stewart, at a wedding less than a week after Pattinson moved out of the home he shared with The Runaways star. 

Perry made it clear in the magazine interview that her relationship with Pattinson is strictly platonic.

Tags: Riley Keough rob pattinson Robert Pattinson Kristen Stewart Katy Perry Lisa Marie Presley