Pete Davidson turned 25 today, but it feels like he lived several lifetimes in the past few months. The Saturday Night Live comedian began 24 as a niche show regular and ended it as a notorious ex-boyfriend who has a song named after him . That was probably the last thing anyone who's been watching Davidson over the years expected, but that's not to say his new high profile isn't deserved. He was a rising star well before his tryst with Ariana Grande , and at 25-years-old, there's a lot to reflect on.