British actress Julie Walters has penned an open letter to herself as a 33-year-old - telling her younger self to listen to Sir Michael Caine.The Mamma Mia! star wrote the note in Books Quarterly Magazine - and dishes out advice she thinks she needed to hear when starring in 1983 movie Education Rita.She writes, "When Michael Caine tells you to pace yourself, listen to him."There's a scene in Educating Rita where you have to cry - and if you start crying in preparation from the minute you wake up, you're not going to have any tears left when the moment comes and you'll look like an awful red blob."

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