Second-half goals from Lyndon Dykes and Scott Robinson saw Livingston stun 10-man Celtic 2-0.
Celtics unbeaten start was ended by a Livingston side who outfought and outplayed their traffic and their lead at the peak of the Scottish Premiership might be gone by the end of the evening too, with Rangers set to leapfrog them into original should they beat Hamilton from the 3pm kick-off.
The Bhoys task wasnt helped by the needless red card for a reckless challenge on Robinson, which left him needing treatment of Ryan Christie.
Robinson could have his revenge Neil Lennons side after the rest, beating on Fraser Forster with a fine finish 2 minutes into the second half following a great Robbie Crawford pass.
Along with also the hosts doubled their lead in fashion if Dykes latched onto a ball before lifting the ball Forster, before comfortably holding company to secure their first win over Celtic at the 24th effort.
More to follow…