"Michelle and I couldn't be more happier [sic] and I wouldn't LIE about that!" Dalton told TMZ.
Dalton competed under the "Jonny Fairplay" moniker during Survivor'spirate-themed seventh installment in Fall 2003, in which he finished third and failed to live up to his self-appointed nickname when he faked that he had just learned of his grandmother's death to win a Reward Challenge.
The Survivor: Pearl Islands appearance landed Dalton several additional reality television roles -- beginning in 2005 with E!'s Kill Reality, which documented the making of the horror film The Scorned and featured a cast entirely comprised of reality stars.
In 2006, Dalton participated in a special three-episodeReality Stars Fear Factor edition of NBC's since-cancelled Fear Factor reality series. This summer, he was part of the celebrity cast of CMT's Dancing with the Stars-like Ty Murray's Celebrity Bull Riding Challenge.
Deighton confirmed Dalton's annuncement in a Monday evening posting on her MySpace blog.
"I'm sure some of you have already heard about mine and Jon's good news well if you haven't here it is... Baby Fairplay is on the way," Deighton wrote. "YES I'm serious and NO I'm not stupid, I was on the birth control shot. It just decided not to work!"
According to Deighton, she only discovered she was nearly four months pregnant about two weeks ago.
"My boobs started getting bigger, I started feeling nauseous and I gained a little bit of weight," Deighton wrote. "I started working out to lose the few pounds I had gained and every time I worked out I got really short of breath."
"I ended up going to the doctor for a check-up and told him about what I had been going through... he felt my stomach...he then said he thought I was about two months pregnant... [then] I went to a women's doctor and he said I'm not two months... try 17 weeks... that was about two weeks ago."
According to Deighton, Dalton was equally surprised to discover she was pregnant. "I had to tell Jon and to tell you the truth I was really, really excited from the start, unbelievable scared also but really happy," Deighton wrote. "He was really, really shocked."
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The couple is hoping for a baby boy, according to Deighton.
"I grew up around girls so I think it's about time I'm around a baby boy. Jon just wants a boy because he just really wants a boy," wrote Deighton. "I don't think he has ever held a baby but I could be wrong. All I know is that he is going to make a great father and I'm happy that this happened."
Deighton and Dalton have been dating for two years, according to TMZ. Deighton believes she's due around January 30.