Royal Baby Watch: Snooki, Kelly Osborne and Kate Gosselin Tweet About Big Arrival (READ)

As the world awaits the royal baby's arrival, celebs took to Twitter to show their excitement.

Kate Middleton checked into St. Mary's Hospital on Monday shortly before 6 a.m. local time.

Here's what some of our favorite stars had to say, according to E! News:

Snooki: "Push girl, pushhhhhh! #KateMiddleton #RoyalBaby #excited"

Piers Morgan: "Keep Calm...and Carry On. #Kate #Labour" and "I watched Arsenal beat Borussia Dortmund 2-1 during my wife's labour in Nov 2011. Very soothing for everyone involved. #Kate"

Sarah Hyland: #BABYWATCH UPDATE! Kate Middleton has gone into labor! A royal baby is being born! I repeat! A #ROYALBABY is being born!!" and "Hey Kate, itd be great if u could pop out that #royalbaby n the next 7 hrs or so so I could say I was here when the baby was born?Kthanksbye"

Andy Cohen: "'@eamitchell26: The world thanks you @BravoAndy for convincing the royal baby it was time to get out here already #wwhl' IT NEEDED A PUSH"

Kelly Osbourne: "Its all so exciting The Royal Baby is on the way!"

Ricky Gervais "'@TV Kev: Any royal baby updates?' It's been accepted into Oxford University."

Cat Deeley: "Exciting, #RoyalBaby on the way xxxx"

Kate Gosselin: "WE FEELHONORED! RT @franciepants3: @Kateplusmy8 saw on CNN..calling royal baby watch 'Will and Kate Plus 1' Wonder how they thought of that?"

Kate Gosselin was referring to CNN's decision to call the royal baby watch "Will and Kate Plus 1." The star was formally on her own reality television show, "Jon and Kate Plus Eight," and then "Kate Plus Eight," after her divorce.

This will be a historic birth for the British monarchy as the couple's first child will become third in line for the British throne, after Prince Charles and William, and will eventually become king or queen.