The Wallabies are set to face one of their own at Twickenham after Nick Cummins agreed to wear the black and white of the Barbarians against Australia in November.

Little more than two months after he left Australia for Japan's Top League, Cummins has agreed to play for the invitational side in the November 1 fixture, which kicks off the Wallabies' five-week spring tour of Europe, his manager said.

Baabaa boy: Nick Cummins is set to play against the Wallabies. Credit:Getty Images

The cameo appearance will be possible because the Top League breaks in late October while Japan plays a domestic Test series against the Maori All Blacks and two Tests away against Romania and Georgia.

Cummins, who has played 15 Tests in the gold jersey, joined the Coca Cola Red West Sparks after playing his final match for the Western Force in Super Rugby in July.