media_removed_toofab 2013

That "Malcolm In the Middle" money went a long way.

Former child star Frankie Muniz and his fiancee, Elycia Marie Turnbow, were spotted in Hawaii this week -- where we got our first look at the engagement ring Frankie got for his lady.

The stone (which looks pink in this photo and canary yellow in others) looks pretty large, doesn't it?!

Frankie, 27, popped the question in October 2011, but the two still haven't tied the knot. 

We're just glad to see Muniz looking happy and healthy after suffering a "mini-stroke" back in December.

Check out more celebrity engagement rings in the gallery above ... and if you're feeling nostalgic, check out some shots from a "Malcolm In the Middle" reunion back in September.

media_removed_toofab 2013