Already as a child, Anderz passion for music, performing and songwriting has been the main thing in life. He started up playing the guitar at the age of seven after hearing dad's vinyl with Diana Ross and the Supremes.
Some years later he began to take piano lessons and started to write songs with his older sister Elin. He soon had his first live show at the local music school in Vellinge, South Sweden where Anderz is born and raised.
A couple of years later Anderz started up his first band, playing melodic hard rock and they soon won the attention from the local media with their own composed songs and powerful live shows. Later he also started to produce and write pop and dance songs and found a new way of creating music beyond his rock band. At the age of 16 Anderz formed a new band with a more funky pop sound, Mighty Nice and got his first record deal and released one album in Sweden and Japan.

After graduating from the Malmoe Academy of Music, where Wrethov had studied guitar, piano and song, he got his first break-through as a producer and songwriter. Wrethov began his international career, with several hit songs in Scandinavia, UK and Germany as a result. Later, Wrethov also established his name in Japan and South Korea by writing for the biggest J and K-pop stars, generating huge record sales and earning him several gold and platinum awards.


Wrethov has written and produced songs for Eleni Foureira, Tusse, Mohombi, Marcus & Martinus, Arash, Margaret, John Lundvik, Medina, Günther and the Sunshine Girls, Bobby Farrell from Boney M, Ch!pz and Swedish singing artists like Samir & Viktor, Hasse Andersson, Markoolio, Panetoz, David Lindgren. Anderz Wrethov wrote several hit songs for Asian mega-stars such as Arashi, KAT-TUN, Tackey & Tsubasa, Super Junior, News, Nana Tanimura, By2, Show Lo and Tegomass. His songs sold over 20 million copies and have been streamed 2 billion times on Spotify.

Wrethov participated in the Swedish Melodifestivalen on twenty-three occasions. In 2006 with "Like Fire Tonight" (Günther & The Sunshine Girls) and in 2008 with "Upp och hoppa" (Frida Feat Headline), which made it to the final. 2013 with "Jalla Dansa Sawa" (Behrang Miri feat Oscar Zia and Loulou Lamotte). 2014 with "Aleo" (Mahan Moin) and in 2015 with "Insomnia" (Ellen Benediktson) and "Guld och gröna skogar" (Hasse Andersson) which made it to the final. 2016 with "Bada Nakna" (Samir & Viktor), "Kizunguzungu" (SaRaha), "We Are Your Tomorrow" (David Lindgren) which all made it to the final. 2017 with "Gravity" (Jasmine Kara) and "Running With Lions" (Alice). 2018 with " Mitt Paradis" (Elias Abbas) and "In My Cabana" (Margaret) which made it to the final. 2019 with "Tempo" (Margaret), "Leva Livet" (Jan Malmsjö), "Who I Am" (Rebecka Karlsson) and the winning song "Too Late For Love" (John Lundvik). 2020 with ”Surface” (Ellen Benediktson, Simon Peyron) and ”Vem e som oss” (Anis Don Demina). 2021 with "One Touch" (Kadiatou), "Om allting skiter sig" (Emil Assergård), "Baila Baila" (Alvaro Estrella) and the winning song "Voices" (Tusse). He is one of the authors behind the song "Fuego" with Eleni Foureira that represented Cyprus in Eurovision Song Contest 2018 in Lissabon and came in second place. He was also one of the authors behind the Arash song "Always", which was performed in the Eurovision Song Contest 2009 for Azerbaijan and which came in third place.

In 2011, Wrethov released his first single and made his debut as a singer. The single "Runaway" was released in Sweden, Poland, Russia and China. Wrethov wrote the official song for the Swedish football team for the FIFA Women's World Cup in 2011. The song is called "One Love One Goal" and became his second single. 2012 Wrethov released the third single "One Life" together with KASE in Poland, Sweden, Russia. The song topped the airplay charts in Poland. 2013 Wrethov released the next single "Break Down", also together with Kase. The song was a huge success in Poland and Kase and Wrethov continuing their collaboration with another radio success "Kings of the World". In 2014 Wrethov released the single "Live Forever" with the polish Dj/producer Gromee that also became a big radio success in Poland. 2015 Wrethov released the single "In Memories" from Avengers: Age of Ultron soundtrack (Marvel Japan)