Hoops supporter Jamie Reilly posted a video of the encounter on social media. It shows the group jumping and singing around a bashful Deila as selfies were snapped.
Though clearly a little embarrassed by the attention, the grin on Deila’s face showed he was at least happy to be a source of joy for his former fans.
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The group chanted, “Ronny Deila, Celtic through and through,” before the now-Vålerenga manager slinked away.