José Alberto Castelo Branco da Silva Vieira is a Portuguese socialite, influencer and former art dealer. He became best known for his activities as a television personality, namely through his participation in reality shows. He also occasionally releases work or performs as a singer.

José Castelo Branco is the son of Francisco José Joaquim Frutuoso da Silva Vieira (Three Wise Men, Bardez, Goa, August 14, 1905 - 1988) - who was the paternal grandson of Caetano Diogo Óscar da Silva Vieira and great-grandson through the male line of Julião José da Silva Vieira. His mother was Inês Paulina Castelo Branco (Tete, December 24, 1921 – Lisbon, December 16, 2014), whose mother was a native Mozambican. José Castelo Branco is the youngest of three children. Among his brothers is Sérgio Vieira, a Mozambican politician and poet. José Castelo Branco also has family ties to former Portuguese Prime Minister António Costa.

He was born and raised in the city of Tete, in northern Mozambique, then a Portuguese overseas province, where he spent his childhood until the age of twelve. He then moved to Lisbon, living in Santo António dos Cavaleiros. He became famous in Lisbon's nightlife, having created his alter ego Tatiana Romanov. In the 1990s, he became friends with socialite Lili Caneças, already a very media-savvy figure in the Portuguese jet-set. At the beginning of that decade, he became an art dealer at a gallery in Cascais.