Pattinson's past and present girlfriend cross paths

There was reportedly an awkward meeting between Robert Pattison's reported current girlfriend, Riley Keough, and his ex-girlfriend, Kristen Stewart, at an event in Hollywood.

The "tense" encounter occurred on Thursday, August 1, at the House of Blues in West Hollywood when the two Hollywood starlets were attending a Joan Jett concert.

Kristen reportedly did not seem pleased when Riley, who previously worked with her on the set of the 'Runaways', approached her to hug her.

A source told a Hollywood tabloid that of the brief exchange between the two, which only lasted a couple of minutes, was far from comfortable and that the two appeared to keep their distance from one another the rest of the evening.

Pattison and Keough, who have only been dating for a short time, are reportedly head over heels for each other, preferring to spend time together at home, and steering clear of the Hollywood nightlife.

A source reportedly said: "Rob and Riley are having a really great time together, even though it's very

early. There is an attraction to each other. They just get each other.

Rob thinks Riley has a cool level head and is not impressed by stardom at all. Rob just loves that about her."

"He loves that she'll go into his kitchen for like 10 minutes and come back with a delicious plate of pasta. They just do typical stuff that has pretty much started all his relationships. They get into debates about politics, human rights, things they had read in the papers that morning," the source added.

"She's pretty good on the piano and he'll often pull out his guitar and they'll have a mini jam session, making up silly songs and funny limericks," sources also said.