The Underworld icon, who turned 45 Thursday, shared photos and her first-person account of the experience on Instagram.
"Best birthday ever. We all prayed that the goat's blessings would happen on Michael's mat and they did. Thank you #laughingfrogyoga and #hellocrittercare for such a fun day and also to Billy and Burlap, for knowing instinctively where to friendly fire," the actress wrote in a message that accompanied photos of her and her family in various yoga poses, some with goats standing on their backs or buttocks.
"Birthday kisses," she captioned a brief video of her feeding a goat a snack from her mouth.