It's thought this could take place on December 9th, days before a vote on Mrs May's Brexit deal in the UK's Parliament.
She's setting off on a nationwide tour to try and sell the agreement she's reached with the EU to the country.
But dozens of MPs in her own Conservative Party currently say they'll vote against it.
UK correspondent Olly Barratt says Theresa May doesn't have much time to change their minds.
IN: "The problem…
OUT: …December."
DUR: 57 seconds
http://www.fsnradionews.com/feeds/1127brexit-ob1.mp3