The speedy wingback has signed a one-year deal with Scottish Premier league club St Mirren.

St Mirren sit second bottom on two points, ahead of pointless Livingston, after four rounds and are coming off a scoreless draw with St Johnstone.

Millar, who had two seasons in Newcastle, had been angling for a return to the United Kingdom after a he spent a three-month loan stint at English League 1 club Shrewsbury Town 12 months ago.

Shrewsbury were in a similar position, struggling for form and in danger of relegation. Millar, playing as a right wingback, made nine appearance as The Town rallied.

Town boss Steve Cotterill was keen to extend Millar's stay but baulked at the $50,000 transfer fee .

Millar, who contracted COVID-19 during his stay in England, struggled to recapture his game-changing form on return to Australia.

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Shrewsbury Town climbed to finish 17^th and Millar said at the end of the A-League campaign that they were among a host of clubs who had shown interest.

"The aim is to test myself again overseas," Millar said in June. "I just have to be patient."

New Zealand under-23 international Dane Ingham and veteran Jason Hoffman are the favourites to replace Millar at the Jets.

Millar in one of two new additions, alongside Ireland under-21 international Connor Ronan (Wolverhampton Wolves), signed by manager Jim Goodwin before the transfer deadline.

St Mirren are at home to Dundee United on Saturday.