(Cover) - EN Showbiz - Justin Theroux introduced Jennifer Aniston to his family this week, it has been reported.

Jennifer and Justin arrived at Heathrow airport in the UK together yesterday. According to onlookers, the pair were incredibly affectionate.

Once settled in London, the couple went for dinner at Shoreditch House, an exclusive members-only club. Thirty minutes after the pair arrived, Justin's cousin, famed documentarian Louis Theroux, joined the party and they enjoyed a meal together.

The group all looked content with each other's company and Justin was chivalrous with Jennifer.

"Louis obviously approved [of Jennifer]," an onlooker told Us Weekly. "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."

Far from being nervous about meeting Justin's relatives, Jennifer looked relaxed and cracked several jokes.

"[Jennifer] was really chilled out and seemed blissfully happy," added the onlooker.

Justin is believed to have recently met Jennifer's father John Aniston at a restaurant in Los Angeles.

The happy couple met on the set of the film Wanderlust last year. Jennifer and Justin went public with their relationship in recent months. Wanderlust is scheduled to be released in October of this year. (C) Cover Media