Tennessee's presidential primaries are held on Super Tuesday, making the Monday stop in the Scruffy City very timely.
The rally will be held at TAC Air Knoxville. The event page says doors will open 8:30 a.m., with the event beginning at 9:30 a.m.
Gov. Bill Haslam endorsed Rubio on Thursday. A spokesperson for the governor said he will be at the Monday event in Knoxville.
“To win in November, conservatives need a candidate who inspires Americans from all backgrounds,” said the two-term governor in a statement. “With Marco standing next to Hillary Clinton on a debate stage, the choice between the future and the past will be clear to every American."
Former U.S. Senate Majority Leader Bill Frist, R-Tenn., also announced Thursday that he is now backing Rubio.
No word on who current Tennessee Sens. Lamar Alexander and Bob Corker will endorse.
Rubio is a Florida senator perceived as appealing more to the mainstream GOP.
John Kasich will also make a campaign stop in Knoxville, though he will be here on Saturday at a closed event for the Knox County Republican Party's annual Lincoln Day Dinner.
On the other side of the aisle, Hillary Clinton is slated to campaign in Nashville this weekend. She is the heavy favorite to win the Democratic primary in the Volunteer state.