On a day when LA's newest football team — the Chargers — stole most NFL headlines, the Los Angeles Rams made a big announcement of their own.

The team hired 30-year-old Sean McVay as their new head coach, the youngest in NFL history.

McVay, who turns 31 in a couple weeks, barely surpasses Alabama head coach Lane Kiffin as the youngest NFL head coach to date. Kiffin was 31 when the Raiders hired him in 2007.

McVay spent seven seasons on Washington's coaching staff, most recently as offensive coordinator. Given his age and boyish charm, Twitter had some pretty great jokes to accompany the Rams' new hire.

Sean McVay's "back in my day" was 2006

— Rodney Stokes (@RodneyStokes21) January 12, 2017

Just a hunch, but Case Keenum, Jared Goff and Sean McVay walk into a bar, the head coach gets carded first. #BabyFaceMcVay pic.twitter.com/TRXUlDZmhS

— Brad Evans (@YahooNoise) January 12, 2017

I have socks older than Sean McVay.

— Scott Cottos (@ScottCottos) January 12, 2017

actual photo of Sean McVay celebrating his new job as the Rams HC pic.twitter.com/aGZMWgkuD5

— Complex Sports (@ComplexSports) January 12, 2017

19 QBs older than Sean McVay started an NFL game this season. pic.twitter.com/dTd4qBKvnf

— SportsCenter (@SportsCenter) January 12, 2017

McVay replaces Jeff Fisher, whom the Rams fired midway through their first season back in Los Angeles, where the team played from 1946-1994. Here's a little perspective on the difference between Fisher and McVay.

Sean McVay was only 9 years old during Jeff Fisher’s first 7-9 NFL season.

— Dan Rubenstein (@DanRubenstein) January 12, 2017

The Rams new head coach will be tasked with improving on the Rams' dismal 4-12 record in 2016. That's a daunting assignment, especially for a 30-year-old.