"Being an actress isn't as fun as it may seem," she tweeted from her verified account. "If I don't love something anymore I stop doing it. I don't love acting anymore so I've stopped doing it."
U.S. & World
However, she admitted that she's a little young to call it quits already.
"I know 24 is a young age to retire but you heard it here first," she tweeted. "I've #retired."
Following her her star-making roles on Nickelodeon's sketch comedy "All That" and her own show on the network, "The Amanda Show," Amanda starred alongside Jennie Garth on the WB sitcom "What I like About You" and hit the big screen in such films as "She's The Man" and "Hairspray."
If she holds true to her retirement revelation, her last film project may be the fall comedy "Easy A," co-starring Emma Stone, due September 17.
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