Rugby star Foden, who began dating Healy in November 2008 after they were introduced by their agents, revealed his intentions to the Daily Mail.
"I am planning to go down on one knee during the next few weeks," said the 25-year-old. 'It won't come as a total surprise because we've been discussing marriage for some time. It will happen and I want lots of children."
Foden also discussed his choice of ring, saying: "I plan to do it right with a simple, classic item from Cartier so she won't refuse me.
"But Una is very discerning about jewellery. I've bought her a couple of pieces but she didn't like them. I guess they were too fussy."
The couple have been sharing a house in London for two years, and have even recorded a song together.