How large of a ceiling? Sheetrock?
Need a complete question please.
You could shiplap it!
Beadboard is pretty and comes in 4'x8' sheets.
If you just want something different, a little molding can make a big difference.
Paint your existing molding white. Paint the ceiling the color of your walls about 8-12" out. then put up a pretty flat molding along the edge between the original molding at the edge of the new paint.
You are only limited by your imagination and skill set! Look at this link!
Coffered ceiling are easy and look great. https://www.hometalk.com/43416560/diy-faux-coffered-ceiling
We’ve done TONS of diy ceilings! You can find them here: https://www.frugalfamilytimes.com/search?q=Ceiling&m=1
Here are some projects on Hometalk that might help you - https://www.hometalk.com/search/posts?filter=ceiling