Jennifer Lopez and Marc Anthony Renew Their Wedding Vows

Jennifer Lopez and Marc Anthony have renewed their wedding vows.

The couple -- who have been married for four years and welcomed twins Max and Emme in February -- took part in a "vow renewal ceremony at 3:15 a.m. Sunday morning at Caesars Palace in Las Vegas," reports Entertainment Tonight.

The ceremony -- which took place at the newly renovated Forum Tower Penthouse -- was officiated by Reverend Steven Smith; two friends served as witnesses. The couple were the first to stay in luxe suite since it reopened.

Lopez recently said her twin son "Max is like Marc. He's got Marc's lungs, and he screams and he's strong, very boy. Emme's very delicate and quiet, but you can't mess with her!"

Overall, the twin babies "are so great! They're getting so big," she said. "They're sitting up and have little teeth coming out."