Catherine Zeta-Jones has stripped down to her bra and hopped into bed with a hunk nine years her junior – for a new film.The Welsh actress and co-star Justin Bartha have been paired opposite each other in The Rebound, reports The Sun.The new flick follows a 25-year-old bloke who starts dating a mum-of-two after she hires him as a babysitter.In the romantic comedy, Zeta-Jones plays newly-single mother Sandy, who moves with her two children Frank Jr. and Sadie to New York to start a new life after finding out her husband is having an affair.As a string of disastrous dates with men her own age, Sandy finds herself attracted to Aram, her children's 25-year-old babysitter, played by The Hangover star Bartha. The film is written and directed by Bart Freundlich.