Blake Lively's sister Robyn - their close bond explored as she lashes out at Justin Baldoni

Blake Lively's sister, Robyn, has defended the actress after she revealed she was suing her It Ends With Us co-star, Justin Baldoni, for sexual harassment

Blake Lively's sister has made it crystal clear whose side she's on in the wake of the actress' shocking lawsuit against Justin Baldoni.

Mum-of-four, Blake, 37, who is married to Ryan Reynolds, 48, is suing It Ends With Us co-star, Baldoni, 40, for sexual harassment, alleging the actor made a concerted effort to “destroy her reputation", which subsequently caused her “severe emotional distress," which he denies.

Twin Peaks star, Robyn Lively, 52, shared several posts on her Instagram Stories, supporting her sister after the allegations and issuing a damning dig to Baldoni in a no-nonsense, six-word post.

Taking to Instagram with a montage of quotes from an article summarising Blake's lawsuit against the actor, she wrote: "FINALLY justice for my sister @BlakeLively." She then shared a link to the same article, and urged: “Please read!”

Robyn also shared an Instagram reel from the New York Times, titled The Waging of an Alleged Smear Campaign Against Blake Lively. Robyn tagged the outlet and journalist behind the video, and wrote: “THANK YOU for this expose on the sinister side of Hollywood.”

Despite the age gap between the sisters, actress Robyn, who, like Blake, has a whole host of films on her CV, including Teen Witch and the Karate Kid III, says the siblings share an incredibly close bond.

Lifting the lid on their relationship, she told Fox News: "There's a significant age gap which feels almost non-existent because she's now a mom. We have so many similarities. Our relationship is on a deeper level. We used to help each other with our projects and lines, things like that. Now we're doing the mom thing together.

"I genuinely feel like her children are mine as if I gave birth to them, and vice versa. We're like, 'Your children are mine too.' Our relationship has only gotten richer and fuller."

Robyn and Blake are half-sisters and have the same mother, Elaine Lively. Robyn shares three children with husband Bart Johnson: Baylen, 19, Kate, 17, and Wyatt, 14. Like Robyn, Blake also has four kids that she shares with husband Ryan Reynolds: James, 7, Inez, 5, and Betty, 2 and Olin, one.

Since they are "so in tune" with one another and their kids, Doogie Howser, M.D. star, Robyn, said she and Blake don't feel the need to give each other advice about motherhood, gushing: "I've learned so much from her, and she’s learned so much from me."

Now, Blake needs her sister's support more than ever as she navigates her bombshell lawsuit against Baldoni. Blake and Justin reportedly had a contentious time working together on the Hollywood movie, which was released in August, and in part of her lawsuit she alleges that Justin made a concerted effort to “destroy her reputation.” Blake claimed that Justin's alleged behaviour caused her “severe emotional distress.” The lawsuit states that a meeting was held back in January to address Blake's claims and her demands for working on the film.

Demands addressed in the It Ends with Us team meeting included "no more showing nude videos or images of women to Blake, no more mention of Baldoni's alleged previous ‘pornography addiction,’ no more discussions about sexual conquests in front of Blake and others, no further mentions of cast and crew's genitalia, no more inquiries about Blake's weight, and no further mention of Blake's dead father.”

Blake's team has said that text messages included in their legal documents show that there was a "multi-tiered plan that Mr. Baldoni and his team described as 'social manipulation' designed to 'destroy' Ms. Lively's reputation."

Bryan Freedman, representing Justin and Wayfarer Studios (Justin’s production company), has shared his reaction to the legal case.

“It is shameful that Ms. Lively and her representatives would make such serious and categorically false accusations against Mr. Baldoni, Wayfarer Studios and its representatives, as yet another desperate attempt to ‘fix’ her negative reputation which was garnered from her own remarks and actions during the campaign for the film; interviews and press activities that were observed publicly, in real time and unedited, which allowed for the internet to generate their own views and opinions."

Follow Mirror Celebs on TikTok , Snapchat , Instagram , Twitter , Facebook , YouTube and Threads .