George Clooney hosted an intimate dinner for Amal Clooney's 37th birthday.

George Clooney and Amal Clooney

George Clooney and Amal Clooney

The 'Monuments Men' star's best friend Rande Gerber was among the guests at the British human rights lawyer's low-key celebration at their home in Los Angeles on Tuesday (03.02.15) and says the actor is "always doing special things for her."

The 52-year-old entrepreneur, who is married to Cindy Crawford, told PEOPLE.com: "We just had a dinner with a small group of close friends at George's house."

Rande, who runs the Casamigos Tequila company with George, 53, previously gushed about how "perfect" Amal was for his friend.

He said: "She's really perfect for him. She's smart and she's beautiful, engaging. She is, again ... smart, but she doesn't make you feel stupid!"

Rande also predicted the brunette beauty and the actor would do "some incredible things" together.

He said: "I've been friends with George probably half my life. And it's just great that he found someone. She's a great girl, and together I think they can do some incredible things."

The former model and Cindy attended the high profile couple's wedding in Venice, Italy in September and recently celebrated Christmas in Mexico together.