
If you were surprised to hear
Kristin Cavallari was pregnant with
Jay Cutler's baby, you're not the only one -- the couple themselves were shocked by the news ... TMZ has learned.
Jay and Kristin announced yesterday they were with child -- following a crazy few months where they broke off their engagement, only to announce it was back on.
Sources close to the couple tell TMZ, K&Jay had discussed the possibility of kids -- but planned to start cranking 'em out in a few years ... not any time soon.
But shocking as it was, we're told they're thrilled with the news ... renewing their commitment more than ever to making their relationship work.
If Jay wasn't locked down before, he sure is now.

Less than three months after
breaking off their engagement at the VERY last minute,
Kristin Cavallari and
Jay Cutler were seen holding hands in L.A. today.
Pretty shocking they would reconnect ... especially because Kristin had already taken pictures IN HER WEDDING GOWN when the two suddenly called it quits.
But the
Chicago Bears quarterback was
spotted in the audience at "
Dancing with the Stars" last night ... and now, some P.D.A. in front of the photogs.
Breaking up really is hard to do.

Jay Cutler has cut even more ties in Colorado -- the former
Denver Broncos quarterback finally sold off the mansion he lived before he was traded to Chicago ... TMZ has learned.
According to official documents, Cutler purchased the home in Parker, CO in 2005 for $1.34 million. Cutler put his home up for sale in 2010 for $1.625 ... but nobody took the bait.
Cutler eventually lowered his asking price ... and the 5,344 square foot estate finally sold on July 19 for a cool $1,000,000.
Don't feel too bad for ol' Jay -- he's slated to rake in $15 million this season ... and of course, he doesn't have a wedding to pay for anymore.
Chicago Bears quarterback
Jay Cutler will be about 110 pounds lighter when he enters training camp this year ... because he just dropped his fiancee, ex-MTV star
Kristin Cavallari.

10 months after they began dating ... and just 3 months after they got engaged ... People.com is reporting the couple has split ... and suggest it was Jay who did the dumping.
Pretty shocking news considering they just hit Miami together earlier this month.
Don't be shocked if Kristin begins rooting for the Packers.
Wearing a glass bikini, former "
Hills" star
Kristin Cavallari walked the Skyy Vodka Diesel runway show in Miami while her bored looking NFL fiancé
Jay Cutler sat in the front row.

You'd be uninterested too if you usually got to see Kristin without the bikini.
Chicago Bears quarterback
Jay Cutler finally came through in the clutch -- for once -- and popped the question to his MTV starlet GF
Kristin Cavallari this weekend ... and apparently, she said yes.

According to People.com, 27-year-old Cutler proposed to the 24-year-old actress (?) during their weekend getaway to Cabo San Lucas.
The two have been dating since last fall.
After all those vapid years on "
Laguna Beach" and "
The Hills,"
Kristin Cavallari finally did something real and productive by helping rebuild schools in Kenya with her Chicago Bears QB boyfriend
Jay Cutler recently.

Love can really change you.
Chicago Bears quarterback
Jay Cutler mustered up enough toughness to stroll around an L.A. shopping center with his girlfriend
Kristin Cavallari yesterday ... TOUGH!!!!!!

Even with his busted knee -- Cutler managed to keep up with Kristin for the entire duration of the shopping trip ... TOUGH!!!!!
Of course, our guy totally screwed up and didn't ask Jay about his injury ... or the rampant criticism of his dedication to the Bears ... or ANYTHING relevant.
But we did ask Kristin about her quick jaunt to Crate and Barrel -- TOUGH!!!!!