Meet Megan Fox and Brian Austin Green's Baby Boy Noah!

Megan Fox and Brian Austin Green showed off their 4-month-old son Noah Shannon Green in Brazil on Sunday. The trio is in Rio de Janeiro for Carnival, which kicked off yesterday, and have already been busy with events. On Saturday, Megan and Brian visited the Heliopolis Urbanization Project in So Paulo, where they were treated to a performance of the martial art capoeira. Today, Megan was solo to promote Brahma beer at a question-and-answer session in Rio after she appeared in a commercial for the brand last month.

Megan and Brian aren't the only stars that traveled for the annual festivities since Kim Kardashian and Kanye West also made their way to South America. Kim and Kanye showed PDA on Friday before taking in the sights over the weekend.