Sale flanker Jason White has been named the Professional Rugby Players' Association player of the year.
White has now won three major award this season
The Scotland captain beat Northampton's New Zealand fly-half Carlos Spencer into second place, with Bristol scrum-half Shaun Perry third.
"When I was nominated initially I was surprised," White said.
"To have won when the standard in the Premiership is so high, it is the greatest award I have ever had. I am over the moon and very honoured."
The prestigious award is the third the 28-year-old has won this season.
White was named Scotland's player of the year last month, and has also won the international player of the year award from the Scottish Professional Rugby Association.
The other nominees were London Irish centre Mike Catt and Leeds' former All Black scrum-half Justin Marshall.
The PRA young player of the year - the Nick Duncombe Memorial Award
- went to Leicester and England winger Tom Varndell, the Premiership's leading try-scorer.
Varndell beat Newcastle's Mathew Tait, Northampton centre Jon Clarke and loose-forwards Tom Rees of Wasps and Magnus Lund of Sale.
Varndell, who is expected to be included in the England squad to tour Australia this summer, said: "It's a huge honour, especially with the other great young players nominated for the award.
"I've been fortunate enough to have a good season and I'm looking forward to the year ahead."