Nicole Kidman first broke out into Hollywood fame in the '90s, and since then, a successful acting career, high-profile marriages to Tom Cruise and current husband Keith Urban, and numerous awards have ensured that she's a Tinseltown staple. It's no surprise then, that the Aussie actress has her fair share of Hollywood BFFs!
"Happy Birthday to my Aussie gal, #NicoleKidman! Shine bright today," Witherspoon, 40, captioned a sweet shot of herself and Kidman. In the picture (above), a smiling Kidman covers her famous red hair with a white straw hat while Witherspoon, also dressed in white, takes the selfie.
Meanwhile, Watts's tribute to Kidman's big day was a bit more tongue-in-cheek. The 47-year-old actress posted a hilarious picture commemorating the stars' famous on-stage kiss last year during the 2015 Women in Film event wearing somewhat unusual attire.
"Happy birthday to my dear friend Nic. You inspire me to do everything... Even snog you in a shower cap," Watts captioned the photo to help ring in the actress's special day.