Katie Holmes helped Suri Cruise lather up with sunscreen by the pool at their hotel in Miami today. The 5-year-old wore a cute ruffled pink suit, while her mom donned a backless one-piece — unfortunately it wasn't a bikini! Katie and Suri lounged on the patio before taking a dip in the water, where Katie kept a watchful eye on her daughter. They're in Florida while Tom Cruise gets to work on Rock of Ages, and his costars Julianne Hough and Malin Akerman have already started production. Julianne and Malin have enjoyed some beachy relaxation, though Tom hasn't popped up shirtless yet. Russell Brand and Alec Baldwin are also in town for filming, and the whole cast is getting to know each other with fun group dinners.