Should I wake her up or let her sleep ?

My almost 2yr old has fallen asleep 2 hrs before her bedtime and I’m unsure on what to do should I let her sleep and hope for the best or should I wake her and put her back down around 7 ? She didn’t take a nap today and was falling asleep whilst eating dinner. I’m not sure what to do I’m so exhausted and don’t want to be up with her for the rest of the night if I let her sleep and she wakes up in 5-6 hrs! Has anyone else’s toddler done this and stayed asleep all night, what should I do !