Serena Williams is the fourth tennis player ever to be named Sports Illustrated’s Sportsperson Of The Year, after Billie Jean King, Chris Evert and Arthur Ashe. It’s an historic moment to say the least.

Here’s the announcement tweet from Sports Illustrated that started it all on Monday morning…

The 2015 #SISportsperson of the year is… @serenawilliams! https://t.co/Zt4QEIl1MY pic.twitter.com/MBVZpWgQiV

— Sports Illustrated (@SInow) December 14, 2015

Williams, who won three of the four Grand Slams this year, shared her thoughts shortly afterwards:

This year was spectacular for me. For SportsIllustrated to recognize my hard work, my dedication,… https://t.co/wsGPJZY7cn

— Serena Williams (@serenawilliams) December 14, 2015

And the rest of the Twittersphere – including the First Lady Of The United States – was thrilled:

Congrats @SerenaWilliams on being named @SInow Sportsperson of the Year! Girls everywhere are dreaming bigger because of you. -mo

— The First Lady (@FLOTUS) December 14, 2015

SLAY SERENA??? https://t.co/Nq0tBaxKi4

— Zendaya (@Zendaya) December 14, 2015

For the 1st time since 1983, an indiv. female was named @SINow “Sportsperson of the Year.” Congrats @SerenaWilliams! https://t.co/cixr01rXtz

— Katie Couric (@katiecouric) December 14, 2015

? https://t.co/Qk9LKGaBAG

— MC HAMMER (@MCHammer) December 14, 2015

YES! LOOOOOOOVE. @serenawilliams that @SInow cover is EVERYTHING. #SportspersonOfTheYear #WhoRunsTheWorld

— kerry washington (@kerrywashington) December 14, 2015

Congratulations @serenawilliams. You're a goddess and this cover is spectacular. ???????? https://t.co/McCedgxlJQ

— Mindy Kaling (@mindykaling) December 14, 2015

Here are some reactions from Williams’ fellow professional tennis players, past and present…

Congrats @serenawilliams on being named 2015 SI Sportsperson of the year!! So well deserved! https://t.co/ex3bPaT6Tp #beautifulcoverpic??

— Caroline Wozniacki (@CaroWozniacki) December 14, 2015

Richly deserved… https://t.co/ZEcqNdvMRr

— Chris Evert (@ChrissieEvert) December 14, 2015

S. Williams Named Sports Illustrated's 'Sportsperson Of The Year'- an amazing year finished off with this- congrats! https://t.co/p9aPRwK5Wj

— Martina Navratilova (@Martina) December 14, 2015

Congrats @SerenaWilliams on being the SI Sportsperson of the year. An amazing year. #love tennis dream big

— Billie Jean King (@BillieJeanKing) December 15, 2015