We spend a lot of time admiring everything about celebrity couples — their red carpet appearances, outfits, relationships, and, of course, engagement rings.But when it it comes to bridal bling, no one does it better than Hollywood's engaged A-listers.Bookmakers have her as the big favorite to play the submissive Anastasia Steel in Universal and Focus Films' adaptation of E. Shailene Woodley was considered her nearest rival for the part, though took the lead role in Fox's 'The Fault In Our Stars' earlier this week.Emma Watson and Mila Kunis have both talked down the chances of them playing Steele.It's not the first time Alexis has been romantically linked to a co-star -- she dated her "Gilmore Girls" on-screen boyfriend Milo Ventimiglia for several years.VIEW THE PHOTOS: From On-Set Romance To Real-Life Love: Hollywood’s Hottest Co-Star Couples!
The romance appeared to end for good though, on "Mad Men," when Beth had a lobotomy.
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Mariah Carey's billionaire beau just proposed with an emerald-cut ring that totes a whopping 35-carat count. There's a new super-sized sparkler in Tinsel Town.
PHOTOS: Love on set "We were completely professional.
We never saw each other out," the 34-year-old actor told alum, 32, came on board in 2012 as Beth Dawes, who ultimately had an affair with Campbell.) PHOTOS: Costar couples The Minnesota native may have never saw it coming, but according to costar Jon Hamm, the chemistry was obvious to others on set.