Alec Baldwin is set to marry fiancee Hilaria Thomas at the the of the month.

The 30 Rock actor will tie the knot with the Spanish-born yoga instructor at New York's Basilica of St. Patrick's Old Cathedral in a Catholic ceremony on June 30.

"This wasn't a quick decision. It took a lot of planning," a source told The New York Post.

The church is where Francis Ford Coppola filmed the famous baptism scene in The Godfather, in which Al Pacino's renunciation of Satan was intercut with the massacre of the Corleone family's enemies. Martin Scorsese also used the church's walled graveyard for a scene in Mean Streets as well as a location in Gangs of New York.

Last month, it was claimed Alec, 54, and 28-year-old Hilaria - who have been dating for almost a year - would elope following the Cannes Film Festival.