The 51-year-old singer surprised bride Branka Delic at her wedding to Gonzalo Cladera at the Graceland Wedding Chapel in Las Vegas, reported Contactmusic.
"I have memories for life which I'll never forget. Such an amazing man to take time from his schedule to come walk this crazy Aussie down the aisle.... Jon..... I salute," the bride said.
Two months ago Delic had started an online petition, BonJoviWalkMeDownTheAisle.Com, to have him at her nuptials which took place at the same chapel where he married his high school sweetheart, Dorothea Hurley, in April 1989.
The 'Always' singer also posted an image of him with Branka at the chapel on the social networking website.
Jon was dressed casually in a white shirt and a pair of jeans.