competition in 2000 and, after coming sixth in the 100 m hurdles, she claimed her first medal with the Swedish women's 4×100 m relay team. Alongside Linda Fernström, Emma Rienas and her twin Susanna, she took the bronze medal with a national junior record of 44.78 seconds. Senior competition She moved up an age level to take part in the 2001 European Athletics U23 Championships and she won the silver medal in the 100 m hurdles, finishing behind her sister. Her major senior debut came at the 2002 European Athletics Championships, but she failed to make it beyond the heats stage of either the 200 m or hurdles competitions. She was chosen for the Swedish relay team at the 2003 World Championships in Athletics, but the Swedes failed to finish their race. Kallur made her global indoor debut at the 2004 IAAF World Indoor Championships and reached the semi-finals of the 60 metres hurdles. An Olympic debut followed later that year, but she did not progress beyond the heats, coming fifth in the hurdles at the 2004 Athens Olympics. She ended her year with two career bests in the sprints in Gothenburg, running 11.43 seconds for the 100 m and 23.26 for the 200 m. European medallist The 2005 season provided her career highlights, starting with a career best run of 7.92 seconds in the 60 m hurdles in February and then a silver medal at the 2005 European Athletics Indoor Championships behind Susanna Kallur. At the beginning of the outdoor season, she won the 200 m gold medal and 100 m silver at the 2006 European Cup. She was chosen to represent Sweden in the hurdles at the 2005 World Championships in Athletics and she ran a career best of 12.85 seconds to make her first major outdoor final. She came sixth in the hurdles final and later ran a Swedish record of 43.67 seconds in the 4×100 m relay, in a team comprising the Kallur twins, Emma Rienas and Carolina Klüft. Her good form continued into 2006, where she was a hurdles finalist at the 2006 IAAF World Indoor Championships and the 2006 European Athletics Championships, as well as part of the fifth-placed relay team at the Europeans. The next year she was selected for the 2007 World Championships in Athletics but she finished last in her heat in what would be her final appearance on the international