Sylvester Stallone is celebrating a major milestone with his wife, Jennifer Flavin. The duo rang in their 25th anniversary on Tuesday and gushed over each other on their Instagram accounts. "There is not enough words to describe what this incredibly selfless dedicated, patient, woman has meant to our lives and I only wish they could be another 25!" Sylvester captioned his post in part. The pair tied the knot in 1997 and share three daughters – 25-year-old Sophia, 23-year-old Sistine, and 19-year-old Scarlet.