Mikael Karlsson Åström (born 30 October 1978), better known by his stage name Vigilante Carlstroem, is the rhythm guitarist of the Swedish garage rock band The Hives.

Vigilante started playing guitar at the age of ten and was influenced by bands such as Sex Pistols, Dead Kennedys and local Swedish punk bands.

Vigilante usually plays Epiphone Coronet guitars and uses Divided by 13 and Fender amplifiers.

An early stage name of his, Barely Legal, was used as the title of their debut LP in 1997.

Vigilante has contributed to the album Ge Fan I Våra Vatten (Don't fucking touch our waters), which is a record made by Swedish musicians as a means to raise funds for the protection of fish in Swedish waters.