American driver Juan Manuel Correa stood up for the first time since he suffered serious leg injuries in the Formula 2 crash which killed Anthoine Hubert.
Correa collided with Formula 2 rival Anthoine Hubert during a race at Belgium's Spa-Francorchamps circuit on Aug. 30.
Hubert was pronounced dead several hours after the crash, while Correa has been in hospital since.
Correa was placed into an induced coma having fallen into a state of acute respiratory failure following the accident.
Once his lungs had recovered he opted against amputation of his right leg and instead had a 17-hour reconstructive surgery on his right leg, which doctors deemed to be a success.
Earlier this month he released a public statement for the first time since the accident, saying he was "grateful to be alive".
On Thursday he posted a video to Instagram of him standing for the first time, with the caption adding "slowly progressing".
Correa faces up to a year of rehabilitation. He has admitted that a 100 percent recovery is still uncertain.
Correa was born in Ecuador, but moved to Miami aged 10. He races under the American flag.
He was signed as a member of the Sauber Junior Team this year and as a result the Swiss company's F1 team -- now rebranded Alfa Romeo -- organised a test of a 2013 F1 car which took place just seven days before the accident in Belgium.