Can someone using Wireshark obtain the full URL if my program uses HTTPS?

While perusing the contents of pcap files I've noticed some URLs appear to be visible despite being HTTPS. These mainly occur inside payloads that contain cert URLs too, but I also see HTTPS URLs inside what appear to be HTTP payloads.

Can someone say conclusively whether HTTPS URLs are truly kept secret?

I'm concerned about this because I want to put some parameters in the URL and I don't want these to be easily uncovered.