The former GMTV presenter proposed during a romantic break to celebrate her 49th birthday on St Patrick's Day.
'I'm so thrilled,' Ruth says in a statement. 'We've discussed marriage many times but this was an incredibly romantic and heartfelt proposal which I will never forget.
'It came as a complete bolt from the blue and I said yes immediately.
'It was very emotional, we were both in tears. I collected my ring yesterday and I'm just so excited.'
Eamonn and Ruth, both 49, have been together for 12 years.
The couple, who are parents to seven-year-old son Jack, plan to get married next spring.
Eamonn also has three teenage children with first wife Gabrielle, who he divorced in 2005.
