is rebuilding her life after finalizing her divorce from and the gave special mention to her close friends for lifting her "up again and again". The actress turned 43 on Sunday, marking the first time she has celebrated a birthday since parting ways from her ex-husband , 47. In March, it emerged that the Oscar winner was having a "really tough" time after the breakup and her friends all chipped in to help her get through the split after 12 years with the dancer.

"It was initially really tough for her, but her friends rallied around her and helped get her through the worst of it," an insider told People Magazine. " is coming out of a really tough and painful year, but she's come out the other side of it stronger and is finding joy in her family, friends and work." In an emotional post on Instagram, she shared a slideshow of images of her various trips and vacations with friends and family.

In the caption, she wrote: "This year, on my birthday, I want to celebrate my gratitude for my friends who lift me up again and again." The 'Black Swan' star was inundated with comments from her some of her best pals in Hollywood, including A-listers and . "Happy Birthday, you incredible diamond of a human! I love you," wrote.

Isla Fisher, who also divorced her husband , said: "Ports I love you. Happy Birthday I'm so grateful you were born." Why did Natalie Portman and Benjamin Milliepied get divorced? and tied the knot in 2012 after meeting on the set of 'Black Swan' in 2009.

The former cou.