Actress Jennifer Lopez and singer husband Marc Anthony renewed their wedding vows in Las Vegas Sunday, People magazine reported.

With two friends serving as witnesses, the couple renewed their vows at Caesar’s Palace’s Forum Tower Penthouse at 3:15 a.m. local time, People said.

Sources reportedly told People that the decision was made at the spur of the moment.

“They decided around 12:30 in the morning that they wanted to do it and started calling for ministers,” a source told People.

Lopez and Anthony reportedly told everyone they were in Vegas to celebrate Anthony’s birthday from last month.

The couple has been married for more than four years.

Click here to read the full report from People magazine.