Deena Nicole Cortese and her gigantic engagement ring are getting into the holiday spirit!

The Jersey Shore star gave fans a look at her hot chocolate overflowing with marshmallows on Instagram, but all fans could focus on was her new sparkler courtesy of longtime boyfriend Christopher Buckner.

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"Get that ring in the shot," one follower commented while another added, "Yes you will be using that left hand a lot more often lol. Congrats!"

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Hot chocolate 🍫☕️ and Christmas movies 👌🏼

A post shared by Deena (@deenanicolemtv) on

Deena Nicole, 29, announced her engagement one week ago on the social media platform, revealing that her now fiancé surprised her with a trip to Mexico to celebrate their five year anniversary — and pop the question.

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"I always knew I would spend the rest of my life with Christopher," she wrote. "But last night while we were walking on the beach in Mexico he made it official!! We're engaged!!!!!"

Congrats! For a look back at the MTV cast today, check out the gallery below!