From Drew Barrymore practically drooling over him to Kelly Clarkson's visible fluster when discussing intimacy coaches, Sam Heughan definitely has a way with talk show hosts. And the online flirtations with his Outlander co-star Caitriona Balfe? From playful birthday wishes to teasing tweets, their chemistry is undeniable. Let's watch the video to see more of Heughan's charming encounters!