George Clooney Parties It Up With Amal's Mom!

George Clooney is the best son-in-law ever.
On Thursday, the 54-year-old actor celebrated the London launch of his Casamigos Tequila with fellow co-founders Rande Gerber and Mike Meldman, as well as the release of Cindy Crawford's memoir, Becoming, at the Beaumont Hotel. (Rande is Cindy's husband.)
Photo: Getty Images

As for George's wife, Amal, she, unfortunately, had a work conflict and could not attend, so the Tomorrowland star graciously brought his mother-in-law, Baria, to the party instead.

Photo: Splash News
A source close to the family tells ET that George and Baria get along really well and he was spotted giving her a sweet kiss on the cheek during the event. "They seem to have a great relationship and she looks like she was having a great time with the whole crew," the source adds.  
Photo: Casamigos
At one point in the evening, George actually played bartender and made drinks for A-list guests including photographer Mario Testino, Jeremy Piven and Downton Abbey actor Allen Leech. 
The party comes a little over one year after George and Amal's wedding. Relive their star-studded marriage in the video below.