A Utah man has filed a multimillion-dollar lawsuit accusing Hollywood actress Gwyneth Paltrow of seriously injuring him during a crash at a Utah ski resort in 2016.

Terry Sanderson says in a lawsuit filed in Utah State Court that Paltrow was skiing out of control and knocked him out, leaving him with a brain injury and four broken ribs.

He claims the incident occurred February 26, 2016, on a beginner run at Deer Valley Resort.

Mr Sanderson, now 72, says Ms Paltrow left him injured on the mountain and did not send help.

He says a Deer Valley ski instructor filed a false incident report saying Ms Paltrow did not cause the crash.

A spokeswoman for Ms Paltrow said the lawsuit, filed on Tuesday, is “without merit” and the actress expected to be “vindicated”.

A spokeswoman for Deer Valley Resort, which is also being sued, said it could not comment on pending legal matters.

Ms Paltrow is known for her roles in Shakespeare in Love and the Iron Man movies. She also owns a lifestyle company called goop.

Mr Sanderson said it took him nearly three years to file a lawsuit because he dragged his feet, ran into problems with previous lawyers and was dealing with inability to function properly because of the concussion.

Mr Sanderson’s lawsuit seeks $US3.1 million ($A4.3 million) in damages.