Kate Beckinsale has joked she is dating Sir Trevor McDonald after dreaming that her daughter had been taking cocaine.
The Widow star has shared a text conversation with her daughter Lily Sheen, 20, on social media, in which the actress asked her daughter, "Are you doing a lot of cocaine?"
Sheen - whose father is Good Omens star Michael Sheen - reassured her mother she was taking "zero" cocaine, only for her mother to reveal she had had a dream about her daughter going on a drugs binge.
In response to reports that her own drug use had been called into question Beckinsale wrote: "If you replaced my first text with 'Are you dating Trevor McDonald?', based on a dream, I don't think anyone would extrapolate that she was, or that I was, or that we both were.
The Underworld actress then went on to joke she is dating 79-year-old news reader Sir Trevor.
She added: "I am in fact dating Trevor Macdonald [sic] and I like to keep it discreet which is why I didn't post about it on instagram. PS when the text is blue , it's me . Right , off to sext Trevor. [sic]"
Beckinsale was previously dating 25-year-old comedian Pete Davidson, but they split in April after a three month romance.
Actors Kate Beckinsale and Michael Sheen attending the Evening Standard Theatre Awards at the Savoy in London.
Two of the stars of "The Golden Bowl", actresses Kate Beckinsale (left) and Uma Thurman, arrive for the film's premiere at the Curzon cinema in London's Soho. Beckinsdale is wearing a dress designed by Stella McCartney.
British star Kate Beckinsale (wearing a Givenchy outfit) and co-star Josh Hartnett arrive at the Odeon, Leicester Square for the UK Gala premiere of the film in which they star Pearl Harbor.
Actress Kate Beckinsale with her husband at the My VH1 Music Awards at the Shrine Auditorium in Los Angeles.
Kate Beckinsale and her partner Michael Sheen arriving at the Vanity Fair post Oscars party held at the Morton's restaurant in Los Angeles. Kate is wearing a gown by Valentino.
Kate Beckinsale at the MTV Movie Awards 2004, Los Angeles. Doug Peters/allactiondigital
Actor Leonardo DiCaprio and actress Kate Beckinsale.
From left to right; Kate Beckinsale, Leonardo DiCaprio, Martin scorcese, Cate Blanchett and Harvey Weinstein.
Kate Beckinsale and her daughter Lily Sheen arrive at the world premiere of 'Harry Potter and the Goblet of Fire' in London's Leicester Square, Sunday 6 November. The film is the fourth version of JK Rowling's series of Harry Potter books to be made.
Kate Beckinsale and Adam Sandler attend the UK premiere of Click at the Empire Cinema Leicester Square, central London.
Direcor Len Wiseman and his actress wife Kate Beckinsale arrive for the UK Premiere of Die Hard 4.0, at The Empire Cinema in Leicester Square, central London.
Kate Beckinsale arrives for the 14th Annual Screen Actors Guild Awards in Los Angeles.
Kate Beckinsale and husband Len Wiseman arrive for the 15th Annual Sir Elton John AIDS Foundation Oscar Party at the Pacific Design Centre in Los Angeles.
Kate Beckinsale and Len Wiseman arriving at the 17th Annual Elton John AIDS Foundation Oscar Party at the Pacific Design Center, West Hollywood.
Actress Kate Beckinsale walks through Terminal 5 at Heathrow Airport, Middlesex, as she and her daughter Lily catch a flight.
Kate Beckinsale arriving at the Vanity Fair Oscar Viewing Party 2010, at the Sunset Tower, Los Angeles
Tim Burton and Kate Beckinsale, judges of the films competing for the Palme D'Or, at a photocall during the Cannes Film Festival in the French town.
Kate Beckinsale arriving at the opening gala premiere of Robin Hood 2010 at the Grand Auditorium Lumiere, Palais des Festivals, Cannes.
Kate Beckinsale arrives at the premiere of the film, "Biutiful" at the 63rd Cannes Film Festival in Cannes, France.
LL Cool J and Kate Beckinsale at the 54th annual Grammy Awards held in Los Angeles on February 12, 2012. CBS/
Colin Farrell, Kate Beckinsale, Jessica Biel and Len Wiseman arriving for the UK Premiere of Total Recall, at the Vue West End, London.
David Walliams and Kate Beckinsale during a visit to College House Junior School where she unveiled a plaque in memory of her late father, Richard Beckinsale, who was a pupil at the school.
Kate Beckinsale attending the opening night of I Can't Sing! The X Factor Musical
Kate Beckinsale attending the Empire Magazine Film Awards held at the Grosvenor Hotel in London.
Kate Beckinsale attends the Metropolitan Museum of Art Gala in New York City.
Kate Beckinsale attending the British Fashion Awards at the London Coliseum, St Martin's Lane, in London.
Kate Beckinsale attending the UK Premiere of Love and Friendship at Curzon Mayfair, London. PRESS ASSOCIATION Photo. Picture date: Tuesday May 24, 2016. Photo credit should read: Ian West/PA Wire
(left to right) Matt LeBlanc, Emilia Clarke, Kate Beckinsale and Dominic Cooper during the filming of the Graham Norton Show at the London Studios in London, to be aired on BBC1 on Friday Evening.
Kate Beckinsale arrives at the Los Angeles Confidential Magazine's Annual Women Of Influence held at The Peninsula Beverly Hills in Beverly Hills, CA on Thursday, June 23, 2016.
Kate Beckinsale at the 22nd Annual Critics' Choice Awards held at Barker Hanger in Santa Monica, CA on December 11, 2016. *** Please Use Credit from Credit Field ***
Kate Beckinsale arriving at the London Film Critics Circle Awards 2017, the May Fair Hotel, London.
Photo credit should read: Doug Peters/EMPICS Entertainment
BEVERLY HILLS - FEBRUARY 26: Kate Beckinsale attends the Vanity Fair Oscar Party 2017 on February 26, 2017 in Beverly Hills, California. (Photo by Rich Fury/PictureGroup) *** Please Use Credit from Credit Field ***
Rose McGowan and Kate Beckinsale arriving for the GQ Men of the Year Awards 2018 in Association with Hugo Boss held at The Tate Modern in London.
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The actress was first linked to the Saturday Night Live cast member when they were spotted leaving a Golden Globes part in January. They then went public when they were pictured kissing at a New York Rangers ice hockey match in March. At around the same time Beckinsale deleted all previous posts on her Instagram account.
Prior to that she dated another stand-up comic Matt Rife, 23, for about a year in 2017.
Beckinsale was previously married to Underworld director Len Wiseman from 2004 to 2015 and was in a relationship with Sheen for eight years. They split in 2003 but have remained friends.