The author has, rather appropriately, written the lyrics for a Swedish singer named Anna Book’s track Heaven For Two.
The song will be one of the 28 performed in hope of being chosen as Sweden's Eurovision 2016 entry.
Läckberg has previously admitted to being a huge Eurovision Song Contest fan. She’s sent contributions to the festival before hoping to compete as a lyricist.
It's not the first time that Anna Book is taking part in Melodifestivalen. Her first entry, ABC, was part of the competition in 1986. She only finished fifth in the competition but the song went on to become a huge Swedish hit that spring.
Book told Swedish newspaper Helsingborgs Dagblad: “I admire her (Läckberg’s) versatility. She has written these lyrics in Rio, in Spain and at home in her kitchen – we worked really well together.”
Other artists taking part this year include Melodifestivalen veterans Martin Stenmarck and Linda Bengtzing, as well as younger artists such as Dolly Style and Molly Sandén and hard rockers, Eclipse.
Heats will take place in Gothenburg, Malmö, Norrköping and Gävle in February.
Sweden is hosting Eurovision 2016 after Måns Zelmerlöw's victory with his track Heroes, last year in Austria. It was the Nordic country's sixth Eurovision title, with only Ireland scoring more wins (seven) in the history of the competition.
Sweden's most famous group of all time, Abba, gave the nation its first taste of success in the contest back in 1974.