How to cover a ceiling plaster crack

[Marmaladegin]

I'd like to redecorate our bedroom but I don't know how to deal with a long fine crack which runs the length of the ceiling (no structural concerns- we had it replastered a few years ago and it just cracked cosmetically shortly after). It's a lovely smooth ceiling which is well lit by windows. I've tried filling, sanding and repainting but it's still really obvious where the change of texture of the filler or paint is... does anyone know of a product to solve this?

I've used this stuff a few time and found it brilliant for covering cracks in walls and ceilings. It's very thick and flexible when it dries. Can be painted over with normal umulsion.

https://www.wilko.com/en-uk/polycell-pure-brilliant-white-crack-free-ceiling-matt-emulsion-paint-25l/p/0105560Polycell paint

I've just done a not great ceiling in Zinsser 5 in 1 and it's come out very well- the very biggest (previously badly filled) crack is visible in some light but not others but it's got rid of everything else and is VERY matt, which helps.