See Every Photo from 'Big Brother' Stars Jessica Graf and Cody Nickson's Black-Tie Wedding

Big Brother and Amazing Race stars Cody Nickson and Jessica Graf wed in front of less than 100 guests during an outdoor ceremony at The Chateau Le Dome at Saddlerock Ranch in Malibu.

Their four-foot-tall cake was designed by Frost It Cakery.

Graf, 27, chose a fit-and-flare wedding dress designed by Mark Zunino after trying on over 30 gowns. "I know it's a princess dress," she says. "But I love it. I feel comfortable in it. I can breath, maybe do a little boogie and still kind of look cute."

A donut wall doubled as a seating chart for the reception.

Graf's bridesmaids wore black dresses. “I know that’s very untraditional, but I like the picturesque feel of it all,” she says of the bold color choice.

Her custom veil, designed at Bridal Reflections, had intricate ombre feather detailing.

Nickson, 33, forgoed a bow tie for a more casual look and rocked his favorite cowboy boots. "My dad always wore cowboy boots growing up. I never thought much of it," he explains. "But yeah, I wear them all the time now."

Graf was surrounded by six bridesmaids at the altar.

The couple exchanged wedding bands by Joey from Hamra Diamonds and vows they wrote themselves.

“Our wildest dreams came true today — we’re married!” they tell PEOPLE. “Being surrounded by our closest family and friends and sharing this special day with them was all we ever wanted. We are so lucky to have found each other in the most unconventional of ways but we did. We found our forever in each other and can’t wait to begin this new chapter of our lives.”

The bride carried a bouquet of black orchids designed by XO Bloom.

There was one very special guest at the wedding, too: the couple's baby on the way. In September, Graf announced that she is pregnant with their first child. "I'm just really excited to see as soon as the birth of our child happens, getting to put a face to the name is just so exciting," she says. "I have goosebumps right now."

Nickson's 6-year-old daughter Paisley (from a previous relationship) served as flower girl at the wedding. "My relationship with Paisley is phenomenal. We're very, very close," says Graf, whom the little girl now calls "Mom." Though Paisley is hoping for a baby brother, "whatever we have, she's going to be a phenomenal older sister," Graf says. Adds proud dad Nickson: "She is genuinely just a good kid, and very easy. Because she's smart, too."

What’s next? First, a honeymoon at the Four Seasons in Bora Bora, before they settle into their new house, currently under renovation, in Nickson’s home state of Texas.

At the end of the night, guests were treated to pizza by Big Mama & Papa’s.

“Fall in L.A. is just so gorgeous out, so I wanted to be dancing under the stars all night long,” Graf says of her vision for her big day. “I wanted for it to be dripping in flowers, and string lights and lots and lots of candles. I wanted it to look just very romantic. Like a daydream.”