Bestselling author – and Dr. Phil's son – Jay McGraw married actress and Playboy model Erica Dahm on Saturday, PEOPLE has confirmed exclusively. 

The couple wed in a non-denominational ceremony before 70 guests inside Dr. Phil and wife Robin's Tuscan-style home in Beverly Hills. 

Event designer Edgardo Zamora of Revelry Event Design transformed the house's center room into an all-white chapel, with 30-ft. sheer fabric panels covered in crystals hanging from the cathedral ceiling. 

The bride wore a custom-made gown by Chado Ralph Rucci and walked down the aisle to Pachelbel's Canon in D Major. Dahm, who is one of triplets, had her sisters Jaclyn and Nicole as bridesmaids; Dr. Phil served as best man. "They wrote the entire ceremony and their vows themselves," wedding planner Michael Gapinski of Along Came Mary tells PEOPLE. "It was a very intimate and beautiful ceremony." 

A reception for 400 guests followed at the Beverly Hills Hotel, where the ballroom was decorated as "a high-styled supper club," Gapinski says. The newlyweds' first dance was to Kenny Chesney's "Me & You." 

The couple met on FOX's 2004 reality show Renovate My Family, which McGraw, 26, hosted and which featured Dahm, 28, and her sisters as construction experts. In August 2005, McGraw proposed with a five-carat diamond, emerald-and-platinum engagement ring he designed. 

McGraw is the author of self-help books for teenagers including Daily Life Strategies for Teensand The Ultimate Weight Solution for Teens. 

Dahm has been in films including Pauly Shore Is Dead and Juwanna Man. She appeared with her sisters in the December 1998 issue of Playboy. This is the first marriage for both.