Archbishop Desmond Tutu was trending on Twitter after receiving a flurry of well wishes from around the world.
The anti-apartheid struggle hero is considered to be a national treasure and is a much-loved icon.
Send your birthday wishes to Tutu in the comments section below!
Read: The Tutus: True love is forever
Here are some of our favourite posts from social media.
Happy 84th Birthday to one of South Africa's greatest men, Archbishop Desmond Tutu @TheDesmondTutu @DesmondTutuPF ✊🏼 pic.twitter.com/U2uLBle52O
— Maps Maponyane (@MapsMaponyane) October 7, 2015
Happy 84th Birthday & a big hug for this fearless warrior & servant God & the Nation.. Archbishop Emeritus #Tutu 🍰 pic.twitter.com/lpOBUb3dHk
— robertmarawa (@robertmarawa) October 7, 2015
Thank you @PatriciaDeLille Cape Town Mayor for visiting Leah and I to wish us happy birthday this morning. #84Phew! pic.twitter.com/KaBZq6ndqo
— DesmondTutu Official (@TheDesmondTutu) October 6, 2015
Happy birthday Desmond Tutu! @DesmondTutuPF pic.twitter.com/nfjCbLdgrK
— Nobel Peace Center (@NobelPeaceOslo) October 7, 2015