The towering striker hit a brace from the bench on a memorable debut which drew high praise from most on-lookers.
His half-hour cameo ranks up there with the most promising starts to life in Scotland, but it doesn’t always go so well.
Inspired by the Jambos’ new hero we took a look at some of the best – and some of the worst starts in Scottish football.
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9. Great start
Chris Maguire: Upstaged high-profile Celtic debutant Robbie Keane, on loan from Tottenham, with the winner on his own maiden appearance for Kilmarnock in February 2010. Photo: SNS Group 0141 221 3602
10. Debut disaster
Henrik Larsson: Slack in possession on his first start at Celtic, he handed Chic Charnley the chance to lash in the winner at Easter Road for a 2-1 Hibs win. Sorry start for the Swede, but he did go on to atone for his mistake... Photo: SNS Group
11. Great start
Colin Stein: Ibrox icon kicked off his career with Rangers in dramatic style - hitting consecutive hat-tricks in his first two games, followed by a double. Photo: SNS Group 0141 221 3602
12. Debut disaster
Nigel Pepper: Red carded six minutes into his Aberdeen debut and then, when he came back from suspension was sent off again within a minute of coming on as a substitute. Photo: Robert Perry