Former lawmaker Regine Yau Wai-ching is preparing to get married to her boyfriend of four years, localist Lam Siu-yin.

Lam was a convener of Spark Alliance, which supported pro-democracy activists' legal bills and living expenses via crowdfunding.

Sources said the two have been at the marriage registry at the end of last month and will be formally married before the summer holiday this year.

Yau, who will be celebrating her thirtieth birthday today, had said she and Lam "'fell in love at first sight" and that Lam is her "soulmate."

Yau and 29-year-old Lam apparently fell in love in 2017. Their relationship was disclosed after the media filmed them hugging and kissing in 2018. Lam was a fourth-year journalism student at Hang Seng University at the time.

Yau was elected as a lawmaker, but lost her seat in November 2016 for shouting pro-independence slogans and insulting China during the oath-taking ceremony.

She was also jailed for four weeks after being convicted of illegal assembly for storming the Legislative Council chamber to retake her oath and assume her post as a legislator on November 2, 2016.

Yau expressed remorse for her behavior in 2017 and said she felt regret for her assistants and those who had voted for her.

"I am embarrassed when I look back at my arrogance and rashness. I am now bearing the consequences of what I have sowed," she wrote on Facebook.

Yau quit Youngspiration, the political party she belonged to, in 2019 and left politics. She then became a key opinion leader and began selling vintage cameras online.

Lam was also a localist and helped activist Edward Leung Tin-kei run in the Legco by-election in 2016.

He is also the former convener and spokesman of Spark Alliance, which was embroiled in a money laundering investigation in 2019, but he'd already quit the alliance in July 2018.

The alliance has been raising money to support protesters who get into difficulties and has said donations would be spent on legal and medical fees, as well as on food for them. Police said the funds could have been spent encouraging youngsters to join protests and froze HK$70 million.

Sparks fly as Yau gears for big day