Kathryn Newton (left) and Sarah Michelle Gellar Theo Wargo/Getty Images; Phillip Faraone/Getty Images Share on Facebook Share on X Google Preferred Share to Flipboard Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Send an Email Print the Article Post a Comment Logo text Kathryn Newton had trouble keeping her composure when she learned she would be sharing the screen with Sarah Michelle Gellar.