Tim McGraw and Faith Hill announced a surprise concert at the Ryman Auditorium on Monday morning (Oct. 3). The show, scheduled for Tuesday, confirms rumors that the duo are the Sam and Audrey who were originally scheduled to perform on Oct. 4.

Both McGraw and Hill tweeted the same graphic on Monday, letting fans know tickets go on sale Monday morning at 10AM CT. They're just $20 through the Ryman Auditorium box office, and there is a limit of four tickets per show. Bobby Bones first shared the news during his morning show. McGraw called Bones to confirm that he and his wife of nearly 20 years would be performing together.

Country's power couple have been appearing together a whole lot lately, mostly in flirty vacation photos from this summer. Many thought it was just to ramp up 20 years of marriage, as their anniversary is this week (Oct. 6). The Tennessean was first to connect the dots that Sam and Audrey may be Tim and Faith — those are the stars' real first names.

Over the summer, McGraw told Taste of Country the key to 20 years of marriage is to "Listen!" He's also the father of three girls, so he jokes he doesn't have much choice but to listen at home. Currently the singer is part of three songs inside the Top 20 of Billboard's Country Airplay chart, including his own "How I'll Always Be" from the Damn Country Music album.

See Tim and Faith's Best Photos Through the Years

Watch: Tim McGraw Talks About 20 Years With Faith