“Magic Mike 3” co-star Channing Tatum.The 55-year-old actress replaced original star Thandiwe Newton in the third installment of the stripper movie franchise and is excited to dish about the upcoming flick.“If you thought he could dance [before], you are going to realize you haven’t seen anything,” the “House of Gucci” star told People on Thursday about Tatum’s erotic expertise. “His dance skills — he just got better,” she explained.“Step Up” star Tatum, 42, seemed to back that up, and divulged a few tidbits about “Magic Mike 3” last month, even revealing the scene that gets the flick rolling.“You’ve seen me dance onstage, but you’ve never seen me give an intimate, straight-up one-on-one lap dance,” Tatum dished to “Entertainment Tonight” at the time.