Get the author of current entry version? How would I go about to get the author from the current version / revision of the entry I'm on? Im trying to get "last updated by" in frontend, but authorId on the entry seems to be the original author, not the last that edited it.
You have to write a template variable that makes getVersionsByEntryId() available in Twig.

public function getVersionsByEntryId($entryId, $localeId, $limit = 1, $includeCurrent = true)
{
    return craft()-&gt;entryRevisions-&gt;getVersionsByEntryId($entryId, $localeId, $limit, $includeCurrent);
}


You can now access an entry’s versions and get the current version’s creator like so.

{% set versions = craft.businessLogic.getVersionsByEntryId(entry.id, entry.locale) %}
{% set author = versions|length ? versions[0].creator : entry.author %}

{{ author.fullName }}