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. A source told the New York Post newspaper: "This wasn`t a quick decision. It took a lot of planning." 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. A source said: "They`ve been telling people they`ll be spending time in Europe, and there`s speculation they`re going to get married." Alec - who has a 16-year-old daughter Ireland with ex-wife Kim Basinger - recently revealed he was considering having children with Hilaria. He said: "Have I thought about having more kids? Oh sure, that would be great, that would be heaven, that would be fantastic."