Clinton spokesman Matt McKenna confirmed Friday that the former president will perform the ceremony and has authorization to do so.
Weiner, who’s 45, and Abedin, who’s 34, are to be married Saturday at the Oheka Castle in Huntington, on Long Island.
The couple have been dating for about two years and announced their engagement last summer.
Weiner is Jewish, while Abedin, who grew up in Saudi Arabia, is Muslim.
The Clintons are in the midst of a busy wedding season. Their daughter Chelsea plans to tie the knot with investment banker Marc Mezvinsky in Rhinebeck, New York July 31.