Heidi Montag and Spencer Pratt
will soon be Mrs. Spencer Pratt.
stars, who reportedly eloped
in November 2008, plan to tie the knot in California on April 25, PEOPLE confirms.
According to a source, Montag, 22, and Pratt, 25, will make it official in a sunset ceremony at the Westminster Presbyterian Church in Pasadena, Calif., on Saturday.
The upcoming wedding comes five months after the pair flew to Mexico for what Pratt described as a "totally spur of the moment" ceremony
. Their Mexican celebration included "margaritas, sunsets and beautiful settings" but no friends or family.
A rep for the couple could not be reached for comment.