Did Lindsay Lohan pull an April Fool's day prank? The 26-year-old actress tweeted a late night message on Monday, April 1 that has her followers anxiously waiting for her to confirm it was only a joke.

"It's official. Pregnant . . ." Lohan tweeted after midnight EST. The Liz & Dick star has yet to confirm or deny the pregnancy announcement as real or fake. 

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Lohan, who was recently sentenced to serve 90 days in rehab, was last spotted arriving in Brazil by helicopter and made headlines for her travel ensemble. The troubled starlet nearly suffered a major wardrobe malfunction by spilling out of her maxi-dress while exiting her ride.

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The Mean Girls actress claims she is on her best behavior after being sentence to rehab. Lohan denied reports on Twitter that she was partying in San Diego last month by writing, "Guys relax, that was not me at A/V or in the Mr. Pink SUV. I'm taking this seriously and focused on the road ahead. I stayed in last night, after a pretty long day, and ordered sushi to my hotel."

"Don't believe every little thing you hear unless you hear it from me," Lohan added. "The support I have gotten has been great and means a lot."

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Whether or not fans should believe her most recent tweet, however, remains unclear. Lohan wouldn't be the only star to pull an April Fool's Day pregnancy prank. Sharon Osbourne joked on The View that she and husband Ozzy Osbourne were a expecting a baby after she underwent in vitro fertilization. After getting hugs from her co-hosts, Osbourne confessed, "It was an April Fools joke."

This article originally appeared on Usmagazine.com: Lindsay Lohan Tweets "It's Official. Pregnant" on April Fool's Day