Rebecca Romijn & Jerry O'Connell

Rebecca and Jerry have been together since 2005 and married since 2007, and Romijn gave birth to twin girls in December. Considering there's only one Hollywood romance in their past (remember when Rebecca was married to John Stamos?), these two have a good chance at survival.

Salma Hayek & Francois-Henri Pinault

Salma and Francois-Henri have been together for a couple of years, and they have a baby girl named Valentina. Salma is no stranger to high-profile relationships, having dated Edward Norton and Josh Lucas before tying the knot with Pinault (twice). Salma is Francois-Henri's first celeb romance, but he has two children from a previous marriage that ended in 2004. We hope it works out, but we're not making any bets on these two for now.

Jessica Simpson & Tony Romo

Tony and Jessica have been together since 2007, but breakup rumors have plagued them the whole time. Both of their pasts are star-studded, as well. Jessica was famously married to Nick Lachey, and she dated John Mayer before moving onto Romo. For his part, Tony has romanced Sophia Bush and Carrie Underwood (though Jessica insists there's no feud between Carrie and herself. It's sad but true: There's little reason to believe this couple will last through 2009.

Nicole Kidman & Keith Urban

Both of these celebs have a rich dating history in the most literal sense. Nicole was famously married to Tom Cruise for 11 years, with whom she adopted two children. Keith dated a non-celebrity for eight years before moving onto model Niki Taylor in 2002. Still, they've been married for a couple of years now and have a baby girl named Sunday Rose.

Jennifer Lopez & Marc Anthony

Rumors awhile back claimed that Jennifer Lopez & Marc Anthony were on the rocks (she allegedly resented that her movies were way more successful before he stepped in), and it didn't help when she was seen out without her wedding ring. But Lopez gave birth to twins Emme and Max in 2008, and the couple seems just as solid as they've been for their five years of marriage. Even though J. Lo has some high-profile relationships in her past (think Sean 'Diddy' Combs and Ben Affleck), these two seem content with the family they've built together. And to appear in dramatic music videos together:

Vanessa Hudgens & Zac Efron

The couple's youth works against them on this count. It's safe to assume that they'll move onto more projects, meet more sexy costars and fall head over heels again. Besides, Zac has said publicly that he's not interested in settling down anytime soon.

Jennifer Garner & Ben Affleck

Jennifer Garner & Ben Affleck have been together since 2004 and married since 2005, and they have two daughters together, Violet and Seraphina. However, both Jennifer Garner & Ben Affleck have a rich history of Hollywood dating that makes you wonder if they'll move on again. Ben's been linked to Gwyneth Paltrow and Jennifer Lopez, while Jen's gotten serious with two costars. She was previously married to Felicity actor Scott Foley, and she dated fellow Alias star Michael Vartan.

Demi Moore & Ashton Kutcher

Demi Moore & Ashton Kutcher have been together since 2003 and married since 2005, but they both have some pretty impressive dating histories. Demi was married to singer Freddie Moore for five years before she wed Bruce Willis, whom she was with for 13 years. For his part, Ashton never married before he met Demi, but he carried on some high-profile relationships with January Jones, Ashley Scott, Monet Mazur and Brittany Murphy. Not bad for a span of five years.

Reese Witherspoon & Jake Gyllenhaal

Reese Witherspoon & Jake Gyllenhaal have only been dating since 2007, but their low-key tendencies and commitment to keeping the relationship private seem to solidify their bond. Neither of them is a serial dater; Reese divorced Ryan Phillippe in 2007 after seven years of marriage, and Jake hasn't really been linked to anyone since he split with Kirsten Dunst in 2005. These two seem to love monogamy, and each other

Halle Berry & Gabriel Aubry

Halle Berry & Gabriel Aubry have been together since 2005, and they have a one-year-old daughter named Nahla. Halle's been married a couple of times before -- to David Justice and Eric Benet -- but she recently said she doesn't want to tie the knot again. Maybe a man 10 years her junior is just what she needs to keep her interested. Gabriel seems content to stick around for a little while -- at least long enough to give Nahla some siblings.

Gwyneth Paltrow & Chris Martin

Gwyneth Paltrow & Chris Martin have been married since 2003, and they have two kids together: Apple and Moses. Ongoing breakup rumors aside, they're a sturdy pair that doesn't get too caught up the celebrity couple lifestyle. They've never walked the red carpet together, and the only photos of them together are candids taken by paparazzi. Seems like Gwyneth seems to have tired of the high-profile romances she shared with Brad Pitt and Ben Affleck.

Iman & David Bowie

Iman & David Bowie have been married since 1992 and have an eight-year-old daughter named Lexi. Though they've both been divorced once before, the relationships were long-lasting -- so you couldn't exactly accuse these two of serial Hollywood dating. Better yet, we'll let Iman describe their relationship herself:

Ellen DeGeneres & Portia De Rossi

DeGeneres & Portia De Rossi tied the knot last year, but they've been a couple since 2004. Ellen's had one high-profile relationship in the past with actress Anne Heche, but Portia's been linked only to non A-listers (she was previously married to a male documentary filmmaker). For the present, they seem content to be out of the tabloid pages and committed to each other. Watch Portia's appearance on Ellen's show below.

Heidi Klum & Seal

Heidi and Seal have been married since 2005, and they have two sons together named Henry and Johan. In fact, the couple recently announced that Heidi's pregnant with her fourth child. Seal also legally adopted Heidi's daughter from a previous relationship with Italian businessman Flavio Briatore, named Leni. Judging from all of the pictures of the whole clan out together on a regular basis, these two are probably in it for the long haul.

Johnny Depp & Vanessa Paradis

This is tricky: Though this couple has been together since 1998, their romantic histories suggest a penchant for dating in Hollywood. Depp's been linked to Winona Ryder and Kate Moss, while Paradis dated Lenny Kravitz. Still, they have two children together and consider themselves to be married, even though they haven't officially tied the knot. Watch the video below to hear Johnny's description of the first time they met (skip ahead about three-and-a-half minutes).

Gwen Stefani & Gavin Rossdale

Gwen and Gavin have been married since 2002, and they have two insanely adorable boys named Kingston and Zuma. Between them, there has only been one previous high-profile relationship, when Stefani dated fellow No Doubt bandmate Tony Kanal. These two seem to be committed to the kids and to each other, as they're constantly seen out and about as a family. Even at the zoo:

Jessica Biel & Justin Timberlake

Media outlets love to claim that Jessica and Justin are tying the knot, but Timberlake told Oprah recently that he isn't getting married anytime soon. They've been together since early 2007, and they currently live together, but that doesn't necessarily mean everything is peachy: Justin dated Britney Spears for like four years of their youth, and he was with Cameron Diaz for three before breaking it off. In any case, Justin managed to ward off some rumors of discord when he kissed Biel on the Jumbotron at a Lakers game recently:

Jada Pinkett Smith & Will Smith

Jada has said in the past that she would give up her career before allowing her marriage to fall apart, and Will has insisted, "Divorce is not an option." Jada Pinkett Smith & Will Smith have been married since 1997 and have two kids together, so it's safe to say these two are in this for life. Better yet, let Jada explain it:

Faith Hill & Tim McGraw

Faith Hill & Tim McGraw have been married since 1996, a surprising longevity for such a high-profile romance. Faith Hill & Tim McGraw have three daughters and reportedly try not to be apart for more than three days at a time, even when they're working.