The 'Mountain Between Us' actress was presented with the Best Actress award by Shailene Woodley for her role in Woody Allen's 'Wonder Wheel' at the Beverly Hilton Hotel on Sunday (05.11.17) and then praised Allison, calling her up from her seat for a smooch.
She said: ''I know I don't really know you but I know I just want to be you. I do, or just stroke you or something. I mean, we could always kiss, maybe?''
''Ah, it's gonna happen! This is an exciting moment!''
Allison, who won the Best Supporting Actress gong for 'I, Tonya', got up from her seat and said: ''It's happening now.''
She then took to the stage and Kate put her hands on the former 'West Wing' actress' cheeks as she planted a smacker on her lips.
Jake Gyllenhaal was another big winner on the night, taking home the Best Actor prize for his portrayal of Jeff Bauman, a survivor of the Boston Marathon bombing, and he praised him in an emotional speech.
He told the audience: ''We've always had this compulsive need for heroes, the need to transform ordinary humans into superhumans, but Jeff Bauman never wanted to be a hero.
''I don't know if I could've found the courage to do what Jeff did in real life, but I know something now that I didn't know then - if we could find in ourselves the strength that Jeff found, we just might not need heroes.''
Other winners on the night included Gary Oldman, who received the Hollywood Career Achievement Award.
He said: ''I began my career almost forty years ago, and at every juncture, some significant person or turn of fate pushed me along. I've had great fortune in my career and I feel every ounce of that privilege.
''We all show up to make something grander than real life and perhaps just maybe find something of a truth in it. It's indeed a very, very special way to earn a living.''
Sam Rockwell was given the Best Supporting Actor accolade for 'Three Billboards Outside Ebbing, Missouri', and Joe Wright, won the Best Director prize for 'Darkest Hour'.
'Mudbound' won the Breakout Ensemble gong and Mary J. Blige took home the Best Breakout Performance prize for an actress for her role in the film, while Timothée Chalamet won the actor equivalent for 'Call Me By Your Name'.
Hollywood Film Awards 2017, full list of winners:
Hollywood Career Achievement Award: Gary Oldman
Hollywood Actor Award: Jake Gyllenhaal, Stronger
Hollywood Supporting Actor Award: Sam Rockwell, Three Billboards Outside Ebbing, Missouri
Hollywood Actress Award: Kate Winslet, 'Wonder Wheel'
Hollywood Supporting Actress Award: Allison Janney, I, Tonya
Hollywood Comedy Award: Adam Sandler, The Meyerowitz Stories
Hollywood Breakout Performance Actor Award: Timothée Chalamet, Call Me By Your Name
Hollywood Breakout Performance Actress Award: Mary J. Blige, Mudbound
New Hollywood Actor Award: Jamie Bell, Film Stars Don't Die in Liverpool
Hollywood Ensemble Award: I, Tonya
Hollywood Comedy Ensemble Award: The Big Sick
Hollywood Breakout Ensemble Award: Mudbound
Hollywood Foreign Language Film Award: Angelina Jolie and Loung Ung, First They Killed My Father
Hollywood Song Award: Diane Warren, Common and Andra Day, 'Stand Up for Something' from the Marshall soundtrack
Hollywood Animation Award: Coco
Hollywood Director Award: Joe Wright, Darkest Hour
Hollywood Documentary Award: Sean 'Diddy' Combs, Can't Stop, Won't Stop: A Bad Boy Story
Hollywood Screenwriter Award: Scott Neustadter and Michael H. Weber, The Disaster Artist
Hollywood Cinematography Award: Roger Deakins, Blade Runner 2049
Hollywood Film Composer Award: Thomas Newman, Victoria & Abdul
Hollywood Editor Award: Sidney Wolinsky, The Shape of Water
Hollywood Visual Effects Award: Joe Letteri, Dan Lemmon, Dan Barrett and Erik Winquist, War of the Planet of the Apes
Hollywood Sound Award: Addison Teague & Dave Acord, Guardians of the Galaxy, Vol. 2
Hollywood Costume Design Award: Jacqueline Durran, Darkest Hour and Beauty and the Beast
Hollywood Make-Up & Hair Styling Award: Jenny Shircore, Beauty and the Beast
Hollywood Production Design Award: Dennis Gassner, Blade Runner 2049
From their newest EP 'What Did You Think When You Made Me This Way', Nothing But Thieves drop the lyric video for their single 'Take This Lonely...
The Lumineers honour their friend and hero Tom Petty with a sensational cover of his 1996 song 'Walls' from the 'She's the One' soundtrack.
Watch Olly Murs get his nerd on as he blags his way into an exclusive Snoop Dogg party (where Rowan Atkinson is the bartender) in the video for their...
From 'Happy' to 'Banana Pancakes', these are soaked in positivity.
Mariah Carey is the picture of glamour in the black and white video for her brand new single 'With You'. It's the lead single from her forthcoming...
Eminem draws attention to the negative response his 2017 album 'Revival' received in the video for his latest song 'Venom'; a song recorded for the...
With the recent release of her third, very well received album 'Hunter' just behind her, Anna had plenty of relatively new songs to showcase.
When two people from different walks of life find themselves unable to take their scheduled...
Dramas exploring the nature of death and the true meaning of life are always in...
Love, time and death connect every single human being on earth, we long for love,...
When Myrtle (Tilly) was little, she lived a happy life, along with her mother in...
After a post-apocalyptic dystopia (The Road) and Prohibition-era America (Lawless), Australian director John Hillcoat brings...
Terrell Tompkins and his team of officers are corrupt, finding ways to embellish their wage...
Sidestepping arguments about accuracy, writer Aaron Sorkin and director Danny Boyle take an artistic, impressionistic...
Steve Jobs was an entrepreneur from the day of his birth and became one of...
Audiences looking for a French historical costume drama should look elsewhere, but those who enjoy...
A sharp improvement on the original, this second entry in The Divergent Series has a...
In the palace of Versailles, a tremendous garden is maintained. One day, the builder and...
Following on from the events of 'Divergent', the mysterious government has discovered a magical maguffin...
Following the revelation that she is Divergent and not specialised for any of the dystopian...