"I saw 'Desi Boyz' yesterday and cannot help thinking that Akshay Kumar is one of the most underrated actors in Bollywood, " Ghosh posted on Twitter.
"I dn't think mch abt the film. But his performance in 'Desi Boyz' is subtle, mature and worthy of acclaim - he deserves a wider range of roles, " he wrote.
Ghosh, who has directed films like "Chokher Bali" and "Raincoat", feels that the 44-year-old might be known for flexible action and perfect comical timings, but there is more in him which is royally ignored.
"We have @akshaykumar slotted as an action hero or in a few comic roles but the fact that he is a fine actor goes unnoticed, " he posted.
Akshay's "Desi Boyz" was released Friday and is doing well at the box office.