Singer Katy Perry and comedian Russell Brand arrive at the 2010 Vanity Fair Oscar party in West Hollywood, California March 7, 2010. [Agencies]

 

Katy Perry is cutting out junk food before her big day.

The 'I Kissed A Girl' singer - who is set to exchange vows with fiance Russell Brand in October - has yet to find the perfect wedding dress for their intimate ceremony, but is already cutting back on fatty foods in preparation.

She said: "I'm preparing a little bit here and there. I have to stop eating McDonald's and start my dance classes."

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The 25-year-old pop star - who accepted the comedian's marriage proposal after a four-month whirlwind romance - is reportedly already thinking about having children with Russell.

A friend close to Katy said: "She's totally in love with him. She never stops talking about Russell and is already talking about how she can't wait to make him a dad."

Russell - who abandoned his womanising ways in order to settle down with Katy - also recently admitted he was beginning to feel broody.

When asked if he wanted to be a dad, the 34-year-old star said: "That would be good, I do want children."