One of Hollywood's favorite duos, Matthew McConaughey and Woody Harrelson, were spotted on South Congress in mid-November with a camera crew.

Nobody is exactly sure what these two are up to, but that hasn't stopped the rumor mill from churning. Some say it's for their upcoming Apple TV+ series, Brother From Another Mother. It'sa 10-episode comedy that is a "heartfelt odd couple love story," according to The Wrap, quoting an early press release. It takes place on a ranch in Texas, so filming around town would make sense.

South Congress Avenue certainly doesn't look like a ranch, though. The actors looked foppish, Harrelson in an all-maroon suit and shiny leather shoes, and McConaughey in a loud, royal purple patterned shirt.

Another theory was that they were shooting Salesforce ads, and someone in the same thread suggested (without a source) that what they were filming wasn't a narrative feature.

And of course Reddit is doing what it does best:

McConaughey and Harrelson starred together in the first season of True Detective.reddit.com

McConaughey said on Access Daily that his mom started the rumor that he and Harrelson are half-brothers.reddit.com

But even though no one knows for sure what the two are doing here, we do have reason to believe that the two real-life best friends and former EDtv and True Detective co-stars are still around. According to an insider, who can't say much because the project is still in the works, the two are "still shooting a bunch of stuff around town," though where they'll be next is a mystery.

And remember, "Time is a flat circle. Everything we have done or will do we will do over and over and over again — forever.” So if you don't catch them this time, sounds like you'll have another chance.