"What a beautiful night. Congrats Laura & Mike! Love you guys honored to be there @fleissmeister," Harrison captioned a photo of the newlyweds on Instagram.
"I'm the luckiest man on earth!!!," Fleiss also tweeted on the day of his nuptials.
Harrison is apparently the go-to man for such a role because he had also presided over the marriage of two other The Bachelor producers before. Back in August 2012, Cassie Lambert and Pete Scalettar -- who met while working on the reality dating show's twelfth season -- tied the knot also at Fleiss' Malibu home.
Fleiss had to take time off from filmingThe Bachelorette's upcoming tenth season starring Andi Dorfman for his wedding. The new edition began taping several weeks ago and is set to premiere on Monday, May 19 at 9PM ET/PT on ABC.
Fleiss ironically served as a judge for the 2012 Miss America Pageant in which Kaeppeler was crowned the winner.
The other judges who sat on the panel alongside Fleiss were Keeping Up with the Kardashians star Kris Jenner, Dancing with the Stars pro Mark Ballas, Extreme Makeover: Weight Loss Edition star Chris Powell, Good Morning America anchor Lara Spencer, actress Teri Polo, and entertainment personality Raul de Molina.