Katie HolmesKatie Holmes is reportedly back on a strict diet and exercise routine - not (just) to slim down for her upcoming wedding to fiance Tom Cruise - it’s for her return to the work instead.

Katie has apparently been signed up for the sequel to last year’s hit Batman Begins and even though filming doesn’t start until early next year, she’s determined not to leave it until the last minute.

A source told NW magazine: “Katie has been told to be ready for filming the new Batman movie in January, which gives her plenty of time to get back in shape. But she has no intention of taking things slowly.”

“She’s already in the gym every day and is being super-strict about what she eats. She’s also doing yoga and has started kickboxing.”