The couple were wed in a candlelit ceremony in Palm Springs, California, at the Parker Palm Springs Hotel, surrounded by 150 family members and friends.
Lance Bass, a longtime friend of Sigler's and an ordained minister, did the honors. Bass was returning the favor — Sigler officiated when Bass and Michael Turchin wed last year.
Sigler's gown was by Oscar de la Renta, with Forevermark Diamonds gems. Dykstra, a minor league baseball player and the son of former Mets outfielder Lenny Dykstra, wore a Brooks Brothers suit. The couple said their own vows after their toddler Beau, 2, marched down the aisle with a baseball plate reading, "Here comes my mommy." Their dog Bean was also a part of the procession.
Sigler was overjoyed by the ceremony, telling People, "I'm excited about just seeing everyone have a great time because we put so much heart and love into this."