When Samuel Johnson announced his retirement from acting last week to focus on his breast cancer fundraising charity, Love Your Sister, everyone was full of praise for the Molly star — except his sister.

Johnson, 38, announced his retirement from acting last week via a post on the Love Your Sister (LYS) Facebook page.

Johnson and his sister Connie, who was diagnosed with terminal breast cancer when she was 33, have raised $2.3 million for cancer research. Johnson said he won’t consider a return to acting until the charity raises $10 million.

It’s a noble goal — but one his sister wishes he’d run past her first.

Connie Johnson

Image: Connie urged her brother to wash his mouth out with soap. Via Facebook.

“Giving up acting, Samuel? At 38 years of age? Bit soon, wouldn’t you say?” Connie wrote in a post of her own on the LYS Facebook page.

“All power to you but don’t go cutting off your nose to spite your face, dear brother. LYS needs you full time, I won’t lie, but I need a Sam with a full belly because I know hangry doesn’t suit you.

“Did you think about this? Were you drunk? There’s no rule against you talking to me before you make such a big decision. You and your tanties, you should’ve grown out of them by now, silly.”

Connie also chided her brother for his use of profanity in his retirement announcement.

“So Samuel, let’s talk. In your retirement post you lost your manners a bit,” she wrote.

“Like most everybody out there, I’ve been known to drop the odd f-bomb myself, but do we really need to do this in public? Do I have to bring the swear jar out again? We have worked hard to build a platform from which we can speak and be heard. Do you really want to put people off by being crass and, frankly, lazy?

“Just because swearing is everywhere doesn’t mean you have to say yes to it. You might think it gives you street cred but have you thought that it might actually be diluting our message? I’m happy for people to swear as much as they like in our feeds, we all know that cancer makes you want to swear if it does nothing else, but we need to attract corporate support to help us win the war against cancer — that’s all that matters here.

“Wash out your mouth with soap young man and get on with the job. All that being said dear brother, I’m so proud of you and so touched that you would make such a personal sacrifice for me and all the other Aussies like me. You really are an OK bloke. I’ll keep you for a bit longer. XXConnie”

Despite the dressing down she gave him on Facebook, it’s obvious there’s a lot of love between Connie and Sam.

“Gotta pay that Con, as hard as it is to admit!” Sam replied in the comments.

“As you know, my emotions override my brain sometimes, but I promise I will tone down the potty. I’m not acting until we hit 10M though. Gotta stand by that one.”

There’s a good chance Connie’s lecture about swearing was tongue in cheek, given that her Facebook post ends with a link to Love Your Sister’s newest adventure, The Stick — For People Who Give A F**k.

Here’s hoping Sam raises that $10 million sooner rather than later.