Former Scotland captain Mike Blair has retired from international rugby at the age of 31.
Scotland's most-capped scrum-half has represented his country on 85 occasions, 14 of them as captain.
In a statement released by the Scottish Rugby Union, Blair said: "I'm in the very fortunate position of being able to decide myself when my international career ends. For me, that time is now."
Blair made a try-scoring debut for Scotland against Canada in 2002 after representing his country at schools, under-19, under-21, sevens and A levels.
He said: "I have enjoyed immensely representing my country for more than 10 years and will miss that exhilarating feeling of running out to a capacity crowd with the whole country behind you.
"The noise when leading the team out for the first time as captain at Murrayfield against England in 2008, when we won 15-9, still makes the hair on the back of my neck stand up when I think about it.
"I want to thank everyone - my family, the Scotland management teams past and present, my team-mates and our supporters - for their enormous contribution to my international career. I have been very fortunate to have these people around me."
Blair has competed for the scrum-half position with 31-year-old Rory Lawson and 30-year-old Chris Cusiter, who have also both captained Scotland.
Cusiter has been out since September with a shoulder injury but his Glasgow team-mate Henry Pyrgos made a try-scoring debut in the November defeat by New Zealand after replacing Blair.
Scotland's interim head coach Scott Johnson said: "I really enjoyed working with Mike during the summer tour and the more recent autumn Tests.
"There's no doubt he's a quality international rugby player and a quality bloke. I respect and understand his decision to retire from the international game now and, on behalf of all Scotland fans, thank him for his years of dedication to the national team."