With France 2-0 down after the first leg of their play-off against Ukraine, Tillier promised to take her clothes off if France recovered to qualify for next year's Finals in Brazil and, sacre bleu, her Les Bleus pulled it off.
Now television viewers may see more than high pressure systems and rising barometers when they tune in on Wednesday after France became the first European side to overturn a two-goal deficit and beat Ukraine 3-0 at Stade de France.
Ratings are expected to go through the roof on Canal+ on Wednesday evening as people tune in to see if Tillier fulfills her promise.
After France scored their second goal to draw level, Tillier tweeted: "F***. 2-0 for France. I start to get stressed."The 27-year-old Tillier is a former model and actress who has been doing the weather report on French nightly news and talk show Le Grand Journal since August 2012.