Sylvester Stallone celebrated his daughter’s 25th birthday with a sweet social media post, calling her a “source of bravery and pride.” Sylvester took to Instagram to share a photo of the two and to celebrate his daughter’s special day.Sylvester Stallone and Arnold Schwarzenegger reunite after spending a year apartLegendary genes: Clint Eastwood and Sylvester Stallone’s daughters are all grown upIn the photo, Sylvester and Sophia hug and smile at the camera.