“Gentleman” star Theo James chimed in on Meghan Markle casting buzz. When asked about recent rumors an ex-royal may join Season 3 of the Netflix show, the actor told Town & Country, “Yes, Fergie is joining.” The “Divergent” star, 41, quipped on Wednesday that Andrew Mountbatten Windsor’s ex-wife, Sarah Ferguson, would “be playing [his] love interest.” James went on to call the speculation “mainly a lot of hot air.” He told the outlet, “At the moment, we’re just trying to get as many eyes on Season 2, and then Season 3 will happen soon.” The show, notably, came out in March 2024 with the second season premiering Thursday — and Page Six…