The 'Transformers' star has finally given in and signed up to the social networking site, posting a perplexed-sounding inaugural tweet on Thursday asking what all the fuss is about.
She wrote: "I'm incredibly late to the party but I'm here nonetheless, so what now?"
Home bird Megan - who has four-month-old son Noah with her husband Brian Austin Green - has added a description on her page reading "Lover. Healer. Mother."
Fans of the beautiful brunette were quick to rush to her aid and offer advice on how to make the most of Twitter. @Yodasnews posted: "Welcome! Just sit back and relax - read some rants, send some RT Love, etc... (sic)"
User @rockerlifecoach suggested: "tell us whats going on. We want to hear your success stories (sic)".
Megan has yet to post another tweet or follow anyone, but the 26-year-old actress already boasts close to 50,000 followers of her own.
Her decision to join the site came hours after "RIP Megan Fox" was trending, but she made no mention of the web death hoax.
Megan announced the news on her Facebook page, writing: "Against my better judgment, I have finally joined Twitter. Every possible version of my name is already in use so for now my Twitter handle is https://twitter.com/MeganFox516."
She has since changed her name to @MeganFox.