5SOS: Luke Hemmings is engaged to his long-term girlfriend Sierra Deaton

5 Seconds of Summer frontman Luke Hemmings has announced his engagement to long-term girlfriend Sierra Deaton.

The singer and guitarist, 24, shared the news on Instagram on Tuesday, posting a gallery of photos from the moment he proposed.

The western Sydney native actually popped the question months ago, but waited until this week to share the news publicly with fans.  

It’s official! 5 Seconds of Summer frontman Luke Hemmings has announced his engagement to long-term girlfriend Sierra Deaton. The singer and guitarist, 24, shared the news on Instagram on Tuesday, posting a gallery of photos from the moment he proposed

Luke captioned the post: ‘With shaking hands but a full heart I proposed to my best friend earlier this year. I love you Thao and I can’t imagine my life without you.’ 

One photo showed the Youngblood hitmaker smiling as he placed a diamond ring on his 30-year-old fiancée’s finger.

In another, the couple kissed while surrounded by floral decorations.

While he didn’t reveal details of their engagement, Sierra said they had celebrated Vietnamese New Year together, hinting Luke may have proposed on February 12.

In love: The western Sydney native actually popped the question months ago, but waited until Tuesday to share the news publicly with fans

Lovers: While he didn’t reveal details of their engagement, Sierra said they had celebrated Vietnamese New Year together, hinting Luke may have proposed on February 12 

‘It was fun keeping this a secret for so long, but my heart is nearly bursting at the seams. Can’t wait for forever,’ she told her Instagram followers.

Sierra, who rose to fame after winning the American version of The X Factor in 2013, also shared the same gallery of engagement photos with her fans.

The lovebirds have been dating since February 2018. 

Stateside: Luke who grew up in Sydney’s western suburbs, lives in Los Angeles with his 5 Seconds of Summer bandmates. Pictured on stage in Sydney on February 16, 2020

Sierra previously described her partner as ‘the most kind, hard-working, funny, talented and sexy man’ in the world. 

Luke previously said 5 Seconds of Summer’s 2020 song Not In the Same Way was about Sierra.

When asked about the song’s meaning in an interview, he said: ‘Well, it’s about me and my current girlfriend. She’s incredible.’

Happy in love: Luke has been dating The X Factor star Sierra, 30, since February 2018