Reese Witherspoon often shares sweet photos of her home life on social media, and fans were delighted after the Big Little Lies star introduced them to her latest family member on Monday.SEE: Reese Witherspoon’s son Deacon looks identical to dad Ryan Phillippe in new modelling shotThe mother-of-three shared a cute snapshot of her new puppy, Minnie Pearl, and wrote in the caption: "Introducing Minnie Pearl.