Hibernian won 3-2 against Rangers in the final of the Scottish Cup at Hampden Park.
David Gray’s headed goal in the second minute of injury time saw Hibs end their 114-year wait to win the prestigious cup competition.
Griffiths played for Hibernian on loan from Wolverhampton Wanderers from 2011 until 2013.
The Scotland international striker has taken to Twitter to revel in the win for Hibs against Celtic’s bitter rivals Rangers.
Delighted with every single person connected with @HibsOfficial today they finally done it and I'm buzzing, I'm off for a party!— leigh griffiths (@Leighgriff09) May 21, 2016
Go on hibs what a final that was btw— barry bannan (@bazzabannan25) May 21, 2016
One of Hibernian’s key players against Rangers was Anthony Stokes, who is on loan from Scottish Premiership giants Celtic.
The 27-year-old Republic of Ireland international winger scored twice and played well throughout.
Hull City midfielder David Meyler was following the match, and he has congratulated his former Sunderland teammate on Twitter.