Making it official, Heidi Montag and Spencer Pratt tied the knot at Westminster Presbyterian Church in Pasadena, California on Saturday afternoon (April 25).

With nearly 200 guests in attendance, Miss Montag was decked out in a custom-made Monique Lhuillier dress topped off with Neil Lane jewelry as her father walked her down the aisle.

During the spectacular ceremony, Heidi's sister, Holly, served as maid of honor while Spencer's sis was among the bridesmaids. Meanwhile, the couple's "Hills" co-stars Audrina Patridge and Frankie Delgado were among those on-hand for the special occasion.

Taking to her Twitter to document the day, Miss Montag wrote: "This is going to be the best day of my life. Thank you God for Spencer."

Enjoy the pictures from Heidi Montag and Spencer Pratt's wedding day (April 25).