@realcaseyrollins They don't usually call it converting unless it involves a baptism, so Christians of other denominations are simply "received" into the church, but yeah it happens. And the rules for baptism are pretty permissive, so most Christian denominations (with a few exceptions, notably the Mormons) are considered validly baptised.

Source: went to Catholic school as a non-Christian, they make sure you know how you could join up if you want