Zac Efron at New Jersey Wedding

Kristen Stewart andRobert Pattinsonhelped a lucky New Jersey couple celebrate their big day this weekend. 

The on- and off-screen couple – along withZac Efron, Andrew Garfield (sans girlfriendEmma Stone) and Will Kopelman (sans wifeDrew Barrymore) – made their way to Englewood, N.J., where Hollywood producer Kevin Turen wed Evelina Oboza on Saturday. 

"They stuck to each other's side all night," an attendee tells PEOPLE of Stewart, 22, and Pattinson, 26, who partied with guests until dawn and were spotted walking hand-in-hand during the celebration. 

And the bride wasn't the only one (likely) wearing something borrowed. 

Before heading to the wedding, Stewart realized she forgot her dress. The solution? The Twilight actress strapped on a short, navy Zac Posen cocktail dress from the groom's sister Ashley's closet (that matched her Christian Louboutin shoes just fine). 

By the end of cocktail hour, however, she was back in her own wardrobe – jeans, a black tank top and a blazer – as she mingled with fellow guests. 

Although Stewart didn't show off the moves she put on display during herTwilight wedding, a date-less Efron, 24, tried his hand at the hora, a traditional Jewish dance, before hanging out with mainly male partygoers for the evening. And Pattinson got in the groove manning the deejay's laptop for a bit.

Quelle: people.com