Reese Witherspoon shared a stunning throwback to social media this week, and her fans couldn’t believe how well she's aged!The 44-year-old took to Instagram, where she shared a snapshot of herself and Clueless star Paul Rudd.Both were dressed up, with Reese wearing glossy red lipstick and a white V-neck while Paul rocked a dapper suit.READ: Why Reese Witherspoon and Kerry Washington's Emmys party was bittersweetPaul smiled at the camera but young Reese appeared deep in concentration as she held