Jude Law and Sienna Miller make doubles debut

[HMG] – If you want the whole world to see you’re dating again, choosing one of NYC’s big social sprees and sharing the red carpet with Jennifer Lopez, Sarah Jessica Parker and others is not a bad plan. And Jude Law and Sienna Miller did just that last night.

The venue for this public declaration of possible doom was the Costume Institute Gala Benefit at the Metropolitan Museum of Art. 28-year-old Sienna wore a daringly low-cut Emilio Pucci halterneck gown, while her 37-year old ex-fiancee played it safe in in a sharp black-tie outfit.

The couple’s last attempt at romance imploded in 2005 after Jude [who has three children; Rafferty, 13, Iris, age 9, and Rudy, who's 7, with ex-wife Sadie Frost,] admitted an affair with their nanny, Daisy Wright — while already engaged to Sienna.

They reconnected last November while both were on Broadway. The festive season saw them together a lot more, and they then shared a Barbados vacation at New Year’s with Jude’s tiny brood.

Tongues wagged even faster when Sienna was recently seen wearing the vintage diamond ring Jude gave her for their first engagement – But this time the News says it was on her right hand.

She didn’t seem to be wearing it last night.

And to show they plan to make this time work the new couple are said to be scouting homes in the north London suburb of Highgate – Where once again they’d be schmoozing with stars:

As one of London’s most expensive neighborhoods the tranquil borough plays host to such notables as Sting, Pierce Brosnan, ‘Dark Knight’ director Chris Nolan, Terry Gilliam, George Michael, Jonathan Pryce and many more.

So what do you think, guys — Can Jude keep his mind on one lady this time?…