The 21-year-old singer is part of the English-Irish boy band that consists of Niall Horan, Zayn Malik, Liam Payne and Harry Styles, reported Daily star.
"They've always been very open when it comes to talking about marriage, and often discuss what kind of wedding they'll have. Now that Zayn (Malik) and Perrie (Edwards) have got engaged, it's naturally cropped up even more. So Louis thinks it's time to make it official," a source said.
"In November, it'll be two years since they fell in love, and he's told pals he thinks it'd be a perfect time to properly ask her to marry him," the source added.