All U Need Is Love

During a calm and peaceful afternoon in Hong Kong, the Grande Hotel (格尼酒店) was suddenly suspected to be the source of the COVID-19 outbreak and the Centre for Health Protection has ordered the hotel to be on lockdown while all hotel guests are forced to be quarantined for 14 days to be tested. While the guests are being quarantined in the hotel, it also brings them connections closer as human beings. As they faced through this difficult time together, they also learn to cherish what might be their final moments of spending time with one another.

• Louis Koo plays the captain of the Epidemic Prevention Operation Unit.
• Tony Leung Ka-fai plays Yam Yan-kau (任因九) (reprising his role from the 2003 film Men Suddenly in Black), a guest at Grande Hotel who is looking for an extraordinary affair.
• Eric Tsang plays Kwok Tin-yau (郭天佑), reprising his role from Men Suddenly in Black, a guest at Grande Hotel who is looking for extraordinary affairs.
• Francis Ng, Gordon Lam and Alex Fong play a trio of COVID-19 diagnosed carriers.
• Michael Hui plays the president of Grande Hotel.
• Kent Cheng and Mary Hon play a married couple.
• Candice Yu plays Kwok Tin-yau's wife.
• Fiona Sit plays a service staff of Grande Hotel who is a single mother.
• Law Lan and Alex Lam play service staffs of Grande Hotel.
• Philip Keung, Annie Liu and Ken Lo play guests at Grande Hotel.
• Yuen Qiu plays a guest at Grande Hotel, parodying her role from the 2004 film Kung Fu Hustle.
• Michael Ning plays a guest at Grande Hotel, parodying his role from the 2015 film Port of Call.
• Chrissie Chau plays a guest at Grande Hotel who is a bodybuilder who has a phobia of men.
• Julian Cheung plays Chai-yau (柴油), a guest at Grande Hotel who is a triad leader.
• Louis Cheung plays Lui Kung (雷公), a guest at Grande Hotel who is a triad leader and Chai-yau's rival.
• Larine Tang play a Japanese actress who is a guest at Grande Hotel
• Cecilia So plays Chu-chu (豬豬), a bride-to-be who is planning to hold her wedding at Grande Hotel.
• Luk Wing plays Chu-chu's fiancé.
• Carlos Chan plays the manager of Grande Hotel.
• Chin Ka-lok plays the head of security of Grande Hotel who is also the president's assistant.
• Ben Yuen
• Cheung Tat-ming as Chu-chu's father.
• Sam Lee plays the security manager of Grande Hotel.
• Jenn Lau
• Ken Wong
• Jacky Cai plays a guest at Grande Hotel who is an office lady.
• Max Cheung
• Gregory Charles Rivers
• Stephanie Che
• Pinky Cheung
• Dough-Boy
• Ng Siu-hin
• Gladys Li plays a chef at Grande Hotel.
• Ng Wing-sze
• Fung Min-hang plays the assistant of Grande Hotel's president.
• Samuel Pang
• June Lam
• Jackie Chan plays the supervisor of the Pandemic Task Force.

The film's theme song, If Love Is in Your Heart (如果心裡是愛), is composed by Lowell Lo with lyrics written by Susan Tong and is collaboratively sung by Andy Lau, Jacky Cheung, Hacken Lee, Joey Yung, Grasshopper, William So, Edmond Leung, Pakho Chau, Fiona Sit, Joyce Cheng, Stephy Tang, Stephanie Cheng, Shiga Lin and Deep Ng.

The film was launched by the Hong Kong Performing Artistes Guild and the Federation of Hong Kong Filmmakers as a benefit project for local film industry workers, with president of both associate bodies Louis Koo along with Eric Tsang contacting 10 of Hong Kong's major film companies, which include Koo's One Cool Film Production, China Star Entertainment Group, Edko Films, Emperor Motion Pictures, Mandarin Motion Pictures, Media Asia Films, Mei Ah Film Productions, Shaw Brothers Pictures International, Sun Entertainment Culture and Universe Films Distribution, to produce the film, with each company providing a fund of HK$3 million, while also applying for a fund of HK$9 million from the Hong Kong Film Development Council, for a total budget of HK$39 million for the film. However, the HK Film Development Council only approved 70% of HK$9 million, so Koo and Raymond Wong gave up the application and hoped to ask each film company for an extra HK$900,000 of funding, but was unsuccessful in doing so, with the final budget of the film being HK$30 million, and caused the film's post-production process being at stalemate at one point.^[5]

Principal photography for All U Need Is Love took place from May to June 2020, mainly taking place at Ocean Park's Marriott Hotel, which was used as the film's fictional central setting, Grande Hotel, with three units filming simultaneously. Due to certain actors wearing protective clothing during filming, media outlets were misled to believe that a real outbreak occurred at the amusement park.^[6]

All U Need Is Love was originally planned for a summer release at around July to August 2020, but was postponed due to post-production difficulties.^[5] The film was theatrically released in Hong Kong on 22 April 2021.^[4]