Movies with a weak first half but a strong second half

Which movies do you think have a poor or mediocre first half, but an amazing second half? Think this doesn't happen very often, most movies usually start off with great promise, but tail off at the end

Never watched it, but heard some people say this about Titanic.

One example that comes to mind is The Irishman. The first half isn't terrible by any means, but it is a bit slow paced and drags on for way too long. The second half is definitely much more entertaining https://www.55printing.com/cheap-color-copies/