Emergency services were called to the northbound carriageway near the Gartcosh junction at about 13:30 on Saturday.
A 62-year-old man, one of the drivers, and a 48-year-old male celebrity , a passenger in the same car, were taken to hospital – but the man later died.
A 42-year-old man, who was driving the other car, was arrested over a road traffic offence and later released.
He was not injured.
The road was closed for about seven hours while crash investigations were carried out and reopened at about 20:40.
Police have urged anyone with information or dash cam footage to get in touch via their non-emergency line.
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