Ireland Baldwin has described stepmother Hilaria as a "wonderful mother".

Ireland Baldwin

Ireland Baldwin

The 25-year-old star has fired back at the backlash Hilaria Baldwin has faced after the 36-year-old media personality announced she was taking a break from social media because she was fed up with being quizzed about her heritage.

Now, Ireland - whose father Alec Baldwin married the yoga instructor eight years ago - has heaped praise on the mother of five and blasted her online critics.

In a lengthy response, she said: "It's so pathetic that anyone would wanna play detective, and dig that deep into someone's life that they don't know, don't know anything about, how they were raised, who they were actually raised by. It's just kinda sad and pathetic.

"And also, it's the holidays, and people are depressed, people are going through a lot. I know I'm going through a lot, personally.

"And the last thing we really need to do is start s*** and gossip about something that is so, so stupid. And about somebody that nobody really even knows...

"And this person has dug up old tweets from Hilaria's high school peers, and they all say one thing about her, that she's really kind, when they reflect back on their experience with her.

"And that's because she is very kind, she's a good person. And she's a caring person who's always respected my relationship with my dad.

"I have a great relationship with her. And she could be a really malicious, terrible, horrible human who tears people down, but she isn't.

"Hilaria is a wonderful mother who takes great care of her kids, and she takes great care of my dad. And that's really all that matters to me."

Hilaria - who has Eduardo, two months, Romeo, two, Leonardo, four, Rafael, five and Carmen, seven - recently insisted she wants "to be left alone".

She wrote on Instagram: "I’ve said my piece. I’m so tired. I’m going to go back to my family, because I’ve been not a very good mommy spending a lot of time focusing on this. I just want to be left alone. I love you and I’m going to sign off for a long time."

She previously revealed she is teaching her children to be bilingual so they can understand and embrace her Spanish heritage, after people slammed her story.

She wrote: "A bit about me. I’ve seen chatter online questioning my identity and culture. This is something I take very seriously, and for those who are asking - I’ll reiterate my story, as I’ve done many times before.

"I was born in Boston and grew up spending time with my family between Massachusetts and Spain. My parents and sibling live in Spain and I chose to live here, in the USA.

"We celebrate both cultures in our home - Alec and I are raising our children bilingual, just as I was raised.

"This is very important to me. I understand that my story is a little different, but it is mine, and I’m very proud of it."