Fitness fanatic Snooki – real name Nicole Polizzi – announced in April that she's expecting her second child with fiancé Jionni LaValle.
She is already mum to son Lorenzo, one.
Snooki has spoken of her desire to remain active and healthy while pregnant, and told fans yesterday: "I've been keeping up with the running and still run three miles a day, which keeps my endurance up throughout this whole pregnancy.
"It doesn't get easier carrying Lorenzo up flights of stairs with a baby in my belly, so I love keeping fit for those reasons!"
And running isn't all she's doing, as she tweeted yesterday: "Whew just killed 3 miles, now buns & guns class."
Snooki has been sharing her pregnancy with fans via her official website, where she admitted last month that although she's staying fit, it's not quite as easy as before.
"The only thing that sucks is running isn't as fun anymore," she said. "My boobs are so sore and literally slap me in the face, and I have to stop running just to go pee every 10 minutes. Messes up my cardio mojo!"
Red-haired Snooki has already revealed her second child will be a baby girl, sharing the moment she found out with fans last week via a cute YouTube video.
Ahead of the arrival of her second child, she's been spending plenty of time with adorable Lorenzo.
She told fans yesterday: "Lorenzo is wild. Everyday he's just more and more a boy, driving his mama crazy. Now that the weather is nice here in Jersey, he's been dying to go in the pool EVERY day and that gives me a heart attack.
"Lorenzo has been to swimming lessons so he knows not to run and jump in the pool, but standing by the ledge still freaks me out! He's definitely an outdoorsie type of kid and he's going to love being in the pool all summer. CAN'T WAIT!"
As well as celebrating Lorenzo's second birthday this summer - and her second baby! - the star is also moving into her new home with Jionni and getting married in autumn. Busy bee!
Snooki documented her first pregnancy in book Baby Bumps: From Party Girl to Proud Mama, and All the Messy Milestones Along the Way, which aims to offer honest information to expectant mums and new parents.
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Celebrities who announced pregnancies in 2014 in pictures:
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