Former Celtic defender Christopher Jullien has opened up on life at his new club Montpellier and admitted he has had his challenges.

The 30-year-old joined the Ligue 1 club from the Hoops last summer after three seasons in Glasgow.

Injuries blighted his last 18 months at Parkhead but the centre-back has gone on to feature more regularly in the French top flight.

Jullien has played 24 times for Montpellier, who currently sit 13th in the league, so far this season and has detailed his struggles at times.

Speaking to Montpellier's official website, he said: "To be completely honest, I would say 'blah'.

"I always gave the maximum but I must admit that I was not at the top in some matches, far from it.

"When you go through periods when you're less well, it's not easy but it's even less so when the collective isn't at its best either.

"Today, since collectively we are better, the individualities stand out better and it's always easier.

"Conversely, when there are negative results, you concede a lot of goals and you are a defender, it is always difficult.

"Let's say that the serenity I feel today I would have liked to bring it as soon as I arrived, but I couldn't find what I needed.

"What is certain, however, is that today I feel more comfortable and I think it shows on the pitch and at team level."

READ MORE: Ange Postecoglou and Celtic's away-day rejuvenation

Meanwhile, 

Hollywood actor and Celtic fan Tony Curran has praised Hoops captain Callum McGregor, calling him a "warrior".

The Scotland international played a crucial role as the Parkhead side defeated Rangers 3-2 in the recent Glasgow Derby to go 12 points clear at the top of the Scottish Premiership.

And Curran, who has starred in films such as Thor and X-Men, had nothing but good things to say about the 29-year-old.

Writing on Twitter, he said: "His incredible ability as a footballer is only matched, nay possibly eclipsed, by his insatiable drive and passion to win!

"We really are so fortunate to have such a warrior as our leader, he’s an inspiration."