how old are mordecai and rigby

Mordecai and Rigby are canonically 23 years old at the start of the Regular Show series. By the end of the series, depending on the timeline and episodes referenced, they are generally considered to be in their late 20s to mid-30s, with some sources citing Mordecai as around 34 years old and Rigby slightly younger. One common age cited is 23 years old at the beginning of the show, which is the official stated age, but they age throughout the series and in some references even beyond that in epilogues or special episodes.