The 34-year-old, who has her own blog, joined the networking site on Friday.
Shetty, who is also the co-owner of IPL team Rajasthan Royals, used the opportunity to promote her team.
“Hello Hello i am the newest inclusion to twitterdom! In London now..IPL Jitters kicking in.Launched the new mascot ‘Moochu Singh’ too cute!! (sic),” the actress wrote.
Shetty was welcomed by filmmaker Karan Johar, an avid tweeter, who had earlier encouraged Arjun Rampal, Ranbeer Kapoor and Shah Rukh Khan to join the website.
“Ok…@theshilpashetty in the house and joins the family…give her love!!!,” Johar tweeted.
Other Bollywood celebrities on twitter are Abhishek Bachchan, Priyanka Chopra, Mallika Sherawat, Riteish Deshmukh, Preity Zinta, Lara Dutta, Shahid Kapoor and Anupam Kher.