AceShowbiz -

Serena might be in for the hugest mistake in her life. During a crazy night out, she said "si" to her new beau, which means that a marriage was happening. Also in the upcoming episode of "Gossip Girl", Blair and Chuck team together to expose Serena's new boyfriend.

The bond between Blair and Chuck prompts Nate to ask Blair to move in with him, a competition that would soon expand to a game of "Who will win the Waldorf?" that ends with unexpected result. The catty Georgina Sparks and Aaron Rose's father Cyrus are back.

About her come back to the Upper East Side, Michelle Trachtenberg who plays Georgina, said previously, "I think there are definitely evil elements that Georgina can never leave behind, but you will be seeing a different, let's say reformed, side of Georgina."

Meanwhile, in a previous casting report Armie Hammer has been cast to be the new love interest of Serena named Gabriel Serrano. This would be the kind of man that she never dated before, a European gentleman. However, Gabriel has met Serena's friend Poppy Lifton first before her. The character will stay at least for three episodes.