big brother alum Tyler Crispen Great for surprises - like revealing that she just got engaged and welcomed her first child!

"Best kept secret ever," Crispen, 29, wrote via Instagram on Tuesday, Jan. 14, with photos of her newborn daughter, Carter Rae Crispen, who was born on Sunday, Jan. 12. "Your mother and I love you more than anything in this world."

Crispen, who was the runner-up for 20 seasons of the CBS reality series, called her daughter "the most beautiful thing I've ever seen." Although he did not reveal the mother's identity, he further surprised his followers by referring to his partner as his "fiancée" and thanked his loved ones for their continued support. She also shared a small Polaroid of the pair, labeling it, "Mom and Dad!"

"My fiance' (oh yeah, double surprise) would like to thank all of our close friends and family for keeping this little secret and helping him and all of us with love," she continued. "I'm the luckiest guy on the planet."

He added, “P.S. Have you ever seen a hard launch?"

The reality star also added pictures of Carter to her Instagram Stories, calling him "my everything" and adding "girl dad" to her bio.

Crispen's mate big brother Alums quickly took to her comments section to congratulate her on her exciting news. Season 21 runner-up Holly Allen Wrote, "Way to launch it 👏 That smile in the last picture is so cute. Congratulations!!!" when Dana Briones added, "Tyler! Congrats. The girls are soooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooood for you!!

Earlier this month, Crispin spoke briefly about her new romance when "Exclusive with Sharon Tharp” podcast, sharing what was behind her decision to keep her relationship out of the spotlight.

“It's something we said early on. If anything, it only strengthens the connection because it can be hard for someone in the public eye to be with someone who isn't," she explained. "And I remember how hard it was for me to push that in the beginning. Going into the show from hearing opinions about you from your friends and family, you come out and you hear opinions being thrown at you on a large scale 24/7. It's Not easy to deal with.”

Crispen Previously employed to him big brother costar Angela Rumans. The pair sparked a showmance in 2018 and eventually bought a house together in South Carolina. In January 2021, Crispen proposed while on the beach.

"Every day you feel like a dream come true and I am now officially the luckiest person on the face of the earth," she wrote on Instagram at the time. "I will love you to infinity and beyond."

The pair finally called it quits in December 2022 after four years together. Crispen later spoke of the split, saying our weekly exclusively That exes will always be Be a "friend".

"I'm not a big believer in burning bridges because he was a big part of my life and I don't want to look back at those memories and have a sour taste in my mouth," he explained. "He'll always have a special place with me, and I think he knows that. I think it's okay to be friends with his exes, everyone. It can work."