The actor proposed to the Forgetting Sarah Marshall star at the end of 2009, after two years of dating.
Bell's representative denied rumours last year (11) that they'd wed in secret, and the actress confesses they're in no rush to exchange vows.
She tells Usmagazine.com, "(We) have no plans (to marry). The ring is on my finger. That's all I care about."
But discussing their future, Bell adds, "We'll do it. We'll have some babies. It will be our gift to America."