Actor, writer, and musician who is best known for his work in television. In May 2013, he appeared in the series finale of The Office as Frat Boy.
He attended the University of Pennsylvania, and graduated with a Bachelors of Arts degree in creative writing.
He is also known for his work on stage, and is the creator, writer, and producer of the comedy show One Night Stand: An Improvised Musical. He also played the role of Woof in the musical Hair at the Hollywood Bowl.
He was born and raised in Los Angeles, California. He has two sisters and two brothers, one of whom is Ben Platt. He has a dog named Lucy. He and his wife Courtney welcomed their son Joseph Michael Platt in March 2019.
In the spring of 2015, he served on the writing staff of the NBC sitcom Mr. Robinson, starring Craig Robinson.