R oberto Irineu Marinho is a Brazilian billionaire and a key member of the powerful Marinho family, which controls the Grupo Globo, Brazil's largest and most dominant media conglomerate. He is the eldest of three sons of the late Roberto Marinho, the legendary founder of the media empire. After their father's death, the three brothers—Roberto Irineu, João Roberto, and the late José Roberto—inherited control of the vast and highly influential company.

Roberto Irineu served as the president and CEO of Grupo Globo for many years, overseeing its vast portfolio of assets, which includes the TV Globo television network, the country's most-watched channel, as well as a range of newspapers, radio stations, and publishing interests. He has since stepped back from an executive role but remains on the board, continuing to guide the family's business strategy. The family's immense wealth and their control over Brazil's most powerful media outlets make them one of the most influential dynasties in Latin America.