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.

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"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.

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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?

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"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.")