The Essex beauty will soon be taking on her bridesmaid duties for the couple's wedding, and ahead of her brother's big day, Jess has said she can't wait to see Mark finally settle down.
Speaking at Lorraine's High Street Fashion Awards last night, she said: "I'm really excited! Excited to gain a new sister and obviously watch my brother get married."
Earlier this month, Mark revealed he and Michelle had just two weeks left to wait before tying the knot, suggesting their nuptials are set to take place this coming weekend.
Without giving too much away, Jess added: "I can't believe how quick it has come around... obviously, Mark can't wait. It's his big day. He's very in love, both of them are, so it's lovely to see how happy he is."
Jess' comments come after she recently joined Michelle in Dubai for her hen do.
The former Corrie star headed to the Middle East with a 30-strong bridal party to celebrate her upcoming wedding. Since returning home not too long ago, Jess made sure to treat fans to a few hen do snaps, so we could see just how much fun Michelle and her hens had while away.
Michelle's hubbie-to-be also made sure to celebrate his last few days before becoming a married man, heading to Vegas with 37 others for his stag do.
He was joined by BFF James Arg Argent, his cousin Elliott Wright and close pal and Big Reunion star Kenzie.
Now back in Essex, Mark has been helping Michelle finalise the pair's wedding plans.
And speaking about her other half, Michelle revealed she is pleased she has Mark to help her get organised for their big day.
"I'm the most disorganised person you'll ever meet," she admitted during an appearance on Loose Women recently. "Whereas mark's the opposite, so it's balancing quite well. We haven't had any arguments yet, well apart from the table plan!"
It is rumoured the pair will wed at Hengrave Hall in Surrey. Mark first popped the question back in September 2013, while he and Michelle were holidaying in Dubai.
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Take a look at Mark and Michelle's romance: