A serial traffic and drink driving pest involved in the death of a 10-year-old girl is back behind bars after pleading guilty to his seventh unlicensed driving offence.

Mitchell William Donald Walsh, formerly known as Mitchell Walsh-McDonald, was today remanded in custody after Magistrate Joe Randazzo told him it was "extremely likely" he be jailed over his latest unlicensed driving offence.

Serial drink driver Mitchell Walsh could face jail.

Walsh, 30, officially pleaded guilty on Wednesday to charges of having no authority to drive while disqualified or suspended. He had earlier entered an endorsed plea of guilty.

Perth Magistrates Court heard that Walsh was intercepted by police on Royal St, Yokine on January 23 this year as he drove his Toyota Hilux to work.