Article continues below advertisementCatherine Zeta-Jones brought the heat to Philadelphia in a racy bikini.The 56-year-old actress sizzled in a low-cut, cleavage-baring black one-piece during her trip to Pennsylvania the weekend of October 18.Zeta-Jones shared a black-and-white selfie wearing the provocative number to her Instagram Story. Article continues below advertisementSource: @catherinezetajones/InstagramCatherine Zeta-Jones enjoyed the water in a sizzling one-piece bathing suit.She paired the halter-style swimsuit with large black sunglasses and a wide-brimmed hat.