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Megan Fox is on the prowl.

"I'm looking for the right boy," the actress -- who called off her engagement to Brian Austin Green in February -- told at the London premiere of Transformers: Revenge of the Fallen on Monday.

"Marriage isn't a realistic goal for someone who is 23, that's all," added Fox, who wore a Kaufmanfranco jersey gown to the premiere and eschewed an umbrella despite the pouring rain.

"I just wanna concentrate on becoming a better person before I try to commit to being someone else's wife," she laughed.

The kind of guy she's looking for? "I want a boy who is really honest and very funny," Fox told Us.

How about costar Shia LaBeouf?

"He's my favorite boy in the entire world!" she admitted, adding that making out with him in the action flick "was pleasant.

"I could do a million takes!" she went on. (LaBeouf feels the same way. When asked if Fox was a good kisser, he said, "Absolutely.")

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