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Catherine Giudici

Instagram, ABC

Catherine Giudici is one proud bride-to-be!

Soon after it was revealed on Monday's The Bachelor that Sean Lowe had asked for Giudici's hand in marriage, the gal happily showed off her huge Neil Lane engagement ring on Instagram.

And what a ring it is.

During last night's "After the Final Rose" special, Giudici and Lowe announced they will be getting married "soon" but no date has been set yet.

Although we're guessing the nuptials probably won't take place before March 18, which is when Lowe will join his fellow celebs on the new season of Dancing with the Stars.