[2] In 1969, she passed the exam at the State Theatre school in Warsaw, but was not accepted due to priority given to students from working-class and rural families.

[2] Jantar married Polish composer Jarosław Kukulski (26 May 1944 – 13 September 2010) on 11 April 1971; the couple had one child, a daughter, singer Natalia Kukulska.

On 16 December 1968, she collaborated with the band Polne Kwiaty and recorded the song Po ten serce Czerwony on the Poznań radio.

She appeared in the musical comedy Milion za Laurę ("Million for Laura"), which was directed by Hieronim Przybył, while performing the song Czujna straż ("Vigilant Guard") with the band Wagantami.

In 1972, she passed the examination before the Verification Commission of the Ministry of Culture and Arts, obtaining the title of a professional singer and assumed the artistic pseudonym: 'Anna Jantar', thus beginning her solo career.

Later, she launched many other hits, including Staruszek świat ("Old Man World"), Za każdy uśmiech ("For Every Smile"), Tyle słońca w całym mieście ('So Much Sun in the Whole City'), Moje jedyne marzenie ('My Only Dream') and many more, which made her one of the most popular Polish singers of the 1970s.

Jantar collaborated with many Polish artists, including with Stanisław Sojka, Bogusław Mec, Zbigniew Hołdys and Andrzej Tenard.

In January and February 1980, she played concerts at the Polish American community clubs in Chicago and New Jersey.

A song with a beautiful title, which can also be a recipe for happiness - Żeby szczęśliwym być ("To be happy").On 14 March 1980, Jantar was returning to Warsaw from New York by LOT Polish Airlines Flight 007, when the plane crashed near Okęcie Airport in Warsaw due to uncontained engine failure.