Celtic led 2-0 at home to Malmo in the Champions League on Wednesday night, having raced into an early lead thanks to goals from Leigh Griffiths and Nir Bitton.
Berget pulled a goal back early into the second half, but Griffiths struck again to restore Celtic's two goal lead - but the Bhoys switched off late on, allowing Berget to bag a second goal and leave the tie wide open for the second leg in Sweden next week.
The story was virtually written before the game; Berget, a Norwegian international, spent half of last season on loan at Celtic having reunited with his former Stromsgodset manager Ronny Deila, but he played just eight games before leaving for Malmo in January.
It was therefore written in the stars that Berget would come back to haunt his former club, as is so often the case, but Berget told The Herald that he feels no sympathy for his former manager - even saying that his brace meant more to him given that it was against Celtic.
"I scored two goals so of course it feels good to score always," Berget said. "But the goals were a little bit extra for me because I didn't do well here."
"I don't feel any sympathy for Ronny! Of course I didn't do as well as I was hoping in a Celtic shirt but it wasn't like I was trying to prove them wrong. I don't know if it was anything to do with the magic of the beard but I am not going to cut it off before the second game!" he added.
Deila and Celtic will now have Berget closely marked for the second leg, but based on his first leg appearance, Berget could be the man to end Celtic's Champions League hopes this season, in an ironic twist of fate.