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Jennifer Aniston may be heading down the aisle sooner, rather than later. But, nobody, including her wedding guests, will have much time to prepare for the nuptials.

Us Weekly is reporting that the "Horrible Bosses 2" star is planning a surprise wedding with fiancé Justin Theroux, and it could happen at any time.

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Friends, no pun intended, "are on the proverbial edge of their seats waiting for their wedding invites," the magazine said.

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Jen and Justin's relationship has been the tabloid fodder since the day they got together. Speculation about the couple's wedding has been circulating since they got engaged two years ago. Since then, many have been left wondering not only when it would happen, but if it would happen.

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But, all signs are pointing to an impromptu wedding. "Sources close to Jen say that her friends are 'in the dark' about the big day, but are planning to be ready at a moment's notice," Us said. Her guests, the magazine said, "will want to be prepared" for the big day.

Sounds like someone may need to start putting some champagne on ice.