Jennifer Aniston has met Justin Theroux's family.

The actress - who began dating the actor earlier this year - was introduced to Justin's documentarian cousin Louis Theroux at exclusive London venue Shoreditch House on Wednesday (20.07.11), following the UK premiere of her new film 'Horrible Bosses'.

A source told Us Weekly magazine: "Louis obviously approved of Jennifer. It looked like they were having a great time, and they all seemed instantly at ease with each other. Justin looked proud of Jen and seemed quite manly and protective."

The trio enjoyed dinner and drinks and another onlooker said the former 'Friends' star "was really chilled out and seemed blissfully happy".

Louis is best known for his Gonzo style journalism on the British television series 'Louis Theroux's Weird Weekends' and 'When Louis Met...'.

Things seem to be getting serious between Jennifer and Justin as the couple are reported to be house-hunting together and have been looking around several Beverly Hills homes.

According to sources, the pair are visiting up to six mansions a day and have even looked at Ellen Degeneres and Portia De Rossi's home, which has been on the market since June for a reported $60 million.

Jennifer, 42, recently sold her Beverly Hills mansion for $38 million and is apparently in a "rush to buy" because she has to be out of the property by the end of the month.