Leah Washington, 18, and Joe Pugh, 19, both from Barnsley, were among four people badly injured on the Smiler ride on 2 June when two carriages crashed.
Ms Washington had a leg amputated and Mr Pugh suffered shattered knees.
The event takes place at the Metrodome Arena in Barnsley on 14 November and includes a pea and pies supper.
Midlands Air Ambulance, the Royal Stoke University Hospital and Staffordshire Fire and Rescue will benefit from the charity event.
Vicky Balch, 20, from Lancashire, also had to have a leg amputated and Daniel Thorpe, 27, from Buxton, Derbyshire, suffered serious leg injuries.
Twelve other people were trapped 25ft (7.6m) off the ground for several hours as emergency services attempted to rescue them.

The images appeared to show the pair on foot during a safari in June at the Gir National Park in western Gujarat state.
Officials at the park said they imposed a preliminary fine because "the cricketer flouted the rules".
Visitors to the park are not allowed to leave their vehicles.
Jadeja's photos were posted days after Gujarat forestry officials warned of the dangers involved in taking selfies with lions, following a number of attacks.
Wildlife officers say they will submit a final inquiry report to their superiors soon.
A.P Singh, chief forest conservator in Gujarat state, told AFP they "had instituted a probe and called Jadeja for a statement... but since he was not available, his father-in-law Hardevsinh Solanki gave a written statement on his behalf" and paid the fine for him.
Jadeja, 27, was part of India's team for the recent World T20 tournament.
A photo posted on Jadeja's Instagram account showed the cricketer pointing to a pride of lions behind him, with the caption, "Family photo, having good time in Sasan (Gir) #rajputboy #wearelions".
A second photo posted to the cricketer's account showed him and his wife, Reeva, with a lion looking on in the background.
The national park at Gir is the only place where Asiatic lions remain in the wild. The animals, which are slightly smaller than African lions, were listed as endangered in 2008.
Two victims of the Alton Towers rollercoaster crash will hold a charity night to raise money for the organisations that helped them.
[NEXT_CONCEPT]
Indian cricketer Ravindra Jadeja has been fined 20,000 rupees (Â£229; $300) after posting photos online of him and his wife posing in front of endangered Asiatic lions.