After what has been a difficult past week, 'Best Song Ever' singer Liam lightened the mood by sharing the snap with fans via Twitter.
In the photo, the singer looks to be in his teenage years as he takes a selfie in the mirror with a thumbs up pose.
Captioning the photo, Liam said: "Right time to brighten things up he's a throwback to one of my many embarrassing moments, great shorts pal!"
Liam's throwback photo followed the aftermath of his bandmate Zayn Malik's decision to quit after five years.
While Zayn said he wants to live life like a "normal 22-year-old", the remaining 1D members - Liam, Harry Styles, Louis Tomlinson and Niall Horan - said they will continue as a four-piece.
In the statement, the band said they respect Zayn's decision to leave, and since then, Liam has taken to Twitter to open up about Zayn's "sad" departure.
In a lengthy post, he said: "This last week has been some of the worst times, possibly the worst. It's something we are all deeply saddened by. It's sad to think for the time being we won't grace the stage as five bros or have the same fun on a tour bus or laughs in a hotel together that we have over the years but I'm super sure us and Zayn will always remain the closest friends."
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