The 43-year-old former Oasis star has sons Donovan and Sonny with Sara, who he met in an Ibiza nightclub back in 2000.
Now according to The Sun, the couple has decided that the time is right to walk down the aisle.
A source told the newspaper, 'Noel secretly asked Sara to marry him on her birthday last October. He's not one for making a big scene. This is the man who kept his leather jacket on when his lad Donovan was born.
'They have been living like they are married for years anyway, but now they have a family together Noel thought it was the right time to do the romantic thing.
'He splashed out on a mega posh Solange Azagury-Partridge ring from a Bond Street jewellers. They are madly in love and spend all their time together without any bickering. They are a perfect match.'