Billy Eichner was 36 in Neighbors 2: Sorority Rising when he played the character 'Oliver Studebaker'.
That was over 8 years ago in 2016.
Today he is 45, and has starred in 18 movies in total, 12 of those since Neighbors 2: Sorority Rising was released.
In Neighbors 2: Sorority Rising, I think Billy Eichner looks: