Helen Mirren knows how to make an entrance. The 70-year-old star left Stephen Colbert stunned and speechless after greeting him with a kiss on The Late Show Tuesday night. The Oscar winner walked out on stage and as the talk show host went to shake hands, she put one arm around his head and pulled him in for a sexy smacker right on the lips. His reaction—complete with blush, stammer, and brow-mopping—seems wholly natural.