Alonestar began his career as a model at the prestigious Storm agency, Nevs, and MOT Models. He has appeared in several worldwide commercials for brands such as Prada, Coca-Cola, and Calvin Klein. Moreover, he has featured in many music pop promo videos, TV series, and films as an Actor, and supporting actor.

In 2011, Alonestar signed with EMI and released Warrior, an EP featuring Jaja Soze, Rosie Ribbons, and the track All Falls Down featuring Ed Sheeran.[3] In the same year, he featured on six singles on the album Dubstep and Funky.[4] He has also been featured on Ed Sheeran’s singles, including Move On, Pause, and You Need Me, I Don’t Need You. Conversely, Ed Sheeran has featured on Alonestar’s singles, including Real Life, All Falls Down, and Raise Em Up. The track Raise Em Up featured in the Vertigo Films movie All Stars in 2013.[5] It was revealed in 2017 that Ed Sheeran secretly appeared in the video for Jethro’s single Skyla Rain in 2010.[6]

In addition to his successful career as a solo artist, Alonestar has collaborated with some of the very best, including Chris Brown, Ed Sheeran, and 2pac, and performed gigs with Amy Winehouse at the Elephant Head Pub in Camden London. Furthermore, Jethro executive produced all the tracks on the Bars and Melody album 143,[7][8] which hit the number 4 position in the official UK chart.

In December 2017 he featured on the Tropical House Cruises to Jamaica compilation album alongside artists such as Damian Marley,  Sean Paul, Sean Kingston, Lee Scratch Perry, Tim Starr, Contractor and Stephen Marley, Sizzla, Cronixx, and many more.[9][10] The album reached no. 1 on the Billboard Charts USA in February 2018, held the spot for five weeks, and didn’t drop below the number five spot for a further 15 weeks.[11][12]

He has also performed in front of crowds of up to 90,000 people, including a stadium gig in  Moscow, Russia.

Alonestar’s album, released in 2020  “Sunshine and Rain”, produced by African producer “Herbert Skillz” released its lead single  “Raise em Up” which hit the number one position in the UK iTunes chart and number six all genres also hitting the UK official top 40 charts amassing two million streams in one week, played on Bbc Radio1, 1xtra and BBC Radio London.

Alonestar has surpassed over 100,000,000 streams  worldwide independently with his own record label Urban angel records.

Alonestar runs his own label, Urban Angel Records, and production company, Urban Angel Productions, with bases in Denmark, Bristol, and London.

In 2022, Alonestar signed a deal with Sony Music and has since launched three imprints on digital service providers (DSPs). Prior to his success in music, Alonestar lived in Trinidad where he collaborated with his label partner and best friend, Kojo Rigault.

“Letter 2 Lucifer” is the latest single from Jethro “Alonestar” Sheeran, released in April 2023. The track features the late rapper 2PAC and was produced by Alonestar himself. The single showcases Alonestar’s production skills and his ability to collaborate with artists from different genres. With this release, Alonestar continues to establish himself as a prominent figure in the music industry.

His hit song “In My Arms” featuring Wayne Wonder cemented his second Billboard plaque, reaching number 12.

With an upcoming album, “Love and Pain,” featuring Wiz Khalifa, Chris Brown, and Future, set to release in the summer of 2023. He has been offered a deal with RBC Records and is considering a move to LA for a year, as well as a 6 part-series Network TV acting role for “The Lot” based in St Louis, USA.

In 2023, Alonestar is set to lead the Micannes Music Conference Festival in Cannes, France, which will take place on June 7, 2023.