President: Rosen Plevneliev
Rosen Plevneliev won the presidential elections in a run-off in October 2011, beating Socialist candidate Ivaylo Kalfin.
He took office in January 2012 for a five-year term in a post that carries few real powers.
As the candidate of the then-ruling centre-right GERB party, Mr Plevneliev's victory was expected to bolster the government's push for painful economic reforms.
When the government of Boyko Borisov collapsed in February 2013 following mass protests over high electricity prices, Mr Plevneliev appointed a caretaker government before fresh elections in May resulted in the formation of a technocratic government headed by Plamen Oresharski.
Before becoming president, Mr Plevneliev was construction minister in the GERB-dominated government of Boyko Borisov. Prior to that, he ran his own building and development company.
Interim prime minister: Georgy Bliznashki
Georgy Bliznashki was named caretaker prime minister by the president in August 2014.
He is to serve in the post until the results of snap elections in October - the second set of early elections in 17 months.
Technocrat prime minister Plamen Oresharski's government resigned on July 23 after a rocky year in office.
It was the second to collapse in less than 18 months after the previous right-wing administration resigned in February 2013 in the face of nationwide protests against poverty and corruption.
Mr Oresharski's government, backed by the Socialists, was also rocked by demonstrations for failing to tackle graft and threw in the towel when it lost the support of a key ally in parliament in June.