Popsugar Parenting Toddlers Lin-Manuel Miranda's Son Singing Mary Poppins Returns Song Lin-Manuel Miranda’s Son Saw Him in Mary Poppins Returns, and It’s Safe to Say He’s Obsessed 17 December 2018 by Alessia Santoro Image Source: Everett Collection Right before his son's third birthday, Lin-Manuel Miranda took Sebastian to see the first act of Hamilton, and shared the toddler's comments in a thread on Twitter that was too cute for words. Now, LMM has completely one-upped that glowing musical review with a sound clip of his son singing "Trip a Little Light Fantastic" from the Mary Poppins Returns soundtrack after he saw his dad in the movie. "Soooooo my kid saw Mary Poppins Returns for the first time. It went well," Lin, who plays Jack in the new movie, tweeted alongside a clip that showcases his now 4-year-old's sweet little voice. In the clip, Sebastian can be heard singing from the song's chorus, repeating the line, "Trip a little light fantastic with me," over and over, and it's so cute, your heart will swell. In a follow-up tweet to the video, Lin shared that Sebastian was bragging about his dad at school, but it didn't exactly go well. "Also, overheard by his teacher last week," LMM wrote. "Seb: My dad is in Mary Poppins [Returns]. Kid: Who's your dad? Seb: He's Lin. Kid: Who's Lin?" LOL, looks like LMM's going to have to do some work with the preschool set to make his musical brilliance known. Check out Seb's adorable singing below! Related: Watch Lin-Manuel Miranda Burst Into Song While Trying to Guess the Disney Movie by Lyric Lin's Original Tweet Soooooo my kid saw #MaryPoppinsReturns for the first time. It went well. ❤️❤️❤️ pic.twitter.com/7eXkrDwBIv— Lin-Manuel Miranda (@Lin_Manuel) December 17, 2018 1 / 11 Reactions to Sebastian's Singing Cool and crying on 9th ave— Ben Platt (@BenSPLATT) December 17, 2018 2 / 11 pic.twitter.com/E30Ah98nVb— LinMiranda.Com (@Linmirandacom) December 17, 2018 3 / 11 Whattt ahhhhhh oh my goodness this is the sweetest thing!!!!!!— Tessa Netting (@tessanetting) December 17, 2018 4 / 11 pic.twitter.com/gMVW7ggRnK— Joel Gleicher (@JoelG_88) December 17, 2018 5 / 11 “fanTASTic” 😭😂❤️— Moriah Henry (@MoriahHenry4) December 17, 2018 6 / 11 Lin's Follow-Up Tweet About Sebastian at School Also, overheard by his teacher last week:Seb: My dad is in Mary Poppins. Kid: Who’s your dad?Seb: He’s Lin. Kid: Who’s Lin? pic.twitter.com/jZYcoYHbPB— Lin-Manuel Miranda (@Lin_Manuel) December 17, 2018 7 / 11 Reactions to Sebastian's Classmate Not Knowing Who Lin Is Sebastian probably: pic.twitter.com/S4UBQ4kd5h— Simply be more Incandescent ✨🌟 (@xjenxbug) December 17, 2018 8 / 11 This Lin... pic.twitter.com/jbvmA9kFVg— Aixa (@dalielusakura) December 17, 2018 9 / 11 Kids—the great equalizer— Denise Helin (@denise_helin) December 17, 2018 10 / 11 this kid needs to be informed— calee🎄 🇬🇹 (@YouDisscussMe) December 17, 2018 11 / 11 ToddlersParenting VideosMary Poppins ReturnsLin-Manuel MirandaViral Videos