All the good wishes of the Labour Party go to Nelson Mandela on his 95th birthday today #MandelaDay
Former heavyweight champion of the world Lennox Lewis, retired South African cricketer Shaun Pollock and rapper P Diddy have tweeted:
Happy Birthday Madiba! http://t.co/8mxoTBNFw4
Happy Birthday Mr. Mandela!!!! Thank you for all you have done!! http://t.co/LuhSsceh20
Nelson Mandela's health is improving, according to two of his granddaughters.
"Our grandfather is doing very well," Zaziwe Dlamini-Manaway told ITV News Africa Correspondent Rohit Kachroo.
"He is stable but critical, but he is doing much better."
Swati Dlamini said she had been seeing a lot of the former South African president in hospital.
"We spend a lot of time back and forth to Pretoria," she said.
As Nelson Mandela turns 95 in a hospital in Pretoria, two of his grandchildren told ITV News they are hoping he will return home soon.
"Of course we always hope that our grandfather's going to go home," Swati Dlamini told Rohit Kachroo.
Zaziwe Dlamini-Manaway agreed: "We want him to go home."
The former South African president has been critically ill in hospital since he was admitted with a lung infection in early June.
Nelson Mandela remains in hospital but his health is "steadily improving," the South African presidency said today.
Madiba is steadily improving http://t.co/pqcjKSQwIX
“On behalf of government and all the people of South Africa, we wish Madiba a joyous 95th birthday," said President Zuma in a statement.
"We are proud to call this international icon our own as South Africans and wish him good health."
Barack and Michelle Obama have sent their best wishes to Nelson Mandela on the former South African president's 95th birthday.
The US president and first lady said the world can honour Mandela by heeding his example and serving others.
The couple met the Mandela family last month on a visit to the former prison on Robben Island where the former leader spent 18 years in jail.
Nelson Mandela has turned 95. A day of celebration is expected in South Africa.
Children gathered outside the Pretoria hospital where he is being treated were filmed singing Happy Birthday to the national hero.
The former South African president has been critically ill in hospital since being admitted with a lung infection on June 8th.