Shane Williams admits he was as shocked as anyone after being called up by the British and Irish Lions for their final warm-up game ahead of the first Test with Australia on Saturday.
Williams toured with the Lions in 2005 and 2009 and also scored a record 58 tries in 87 Tests for Wales.
He retired from international 18 months but has been playing professional rugby in Japan, where he answered the call from Lions head coach Warren Gatland to play against the ACT Brumbies on Tuesday.
The 36-year-old will only play in Brisbane and will not feature in any of the Tests against the Wallabies but the move by Gatland is still a surprise one.
"It was completely out of the blue," said Williams, who was due in Australia to carry out some media work for the tour.
"I never thought I would ever get this opportunity again, but if me contributing on Tuesday is going to help the Lions squad be successful in the three Tests then that is what I am here to do.
"Rob Howley (Lions assistant coach) phoned me. It is still sinking in.
"I am over the moon, and what I will do on the field is give my 100% effort and commitment and do whatever it takes to help the team out.
"I have been playing in Japan over the last 12 months. Fitness is not going to be an issue.
"If I had any doubt whatsoever that I wasn't capable or good enough then I would have said no, because there is no way I will let the Lions down.
"I get into Sydney on Monday morning, and I am training at about half past 10."