Sir Frank Williams has been released from hospital and returned home after contracting pneumonia, his daughter and Williams F1 deputy team principal Claire Williams confirmed.
He was taken ill after the Italian Grand Prix and has been in hospital receiving treatment since September.
Claire Williams has missed the last five race weekends to remain in the UK and be closer to her father.
Williams CEO Mike O’Driscoll said over the Mexican GP weekend he was making a “slow and steady” recovery.
"He's now back home and he's back at the factory," Claire Williams told media at the team’s factory, after announcing its 2017 F1 driver line-up.
"He contracted pneumonia after Monza and has been in hospital ever since.
"It has been a slow recovery but I'm pleased to say he's pretty much back to the old Frank we know and love.
"It's lovely to have him back with the team."
