Alice, who shares two daughters with the Welsch actor, blasted Tamzin on social media after the soap star shared her support for Ioan’s new romance – after he went Instagram official with co-star Bianca Wallace.
Ioan, 48, took to Instagram to make his new relationship public but it didn’t go down well with his ex-wife Alice who accused him of having a ‘three-year affair’ behind her back.
After laying eyes on Ioan’s sweet post – where he insisted that Bianca helped him to smile again in the midst of his bitter divorce – the EastEnders star penned ‘amazing’ underneath the relationship reveal snap.
But as soon as Alice saw Tamzin’s supportive comment, she turned on the actress.
“Tamzin? WTH? You knew about this???” the heartbroken star raged.
Ioan ex-wife didn’t stop there though, she also blasted his Harrow co-star Ella Newton – accusing her of turning a blind eye while her husband had ‘an affair’ behind her back.
Alice fumed: “So you KNEW the whole time and you CONGRATULATED them?
“Do you know they have broken up a family? How can you possibly? This will stay with you forever.”
While Welsch actor Ioan appears to be happier than ever in his new relationship, the opposite can be said for Alice who hit out at the Harrow star within minutes of his relationship reveal going public.
Taking to Twitter, Alice accused Ioan of having an affair with Bianca for three-years.
In a scathing post, she penned: “So, it turns out that my husband, after two years of telling me I’m a bad person and I’m not exciting and he no longer wants to have sex with me and he just wants to be on set abroad – has been in a relationship for THREE years behind all our backs.”
Following her outburst, Alice has since confirmed that she has yet to hear from her husband of twenty years.
“Still nothing. We were together for 20 yrs,” she told.
“We spoke every day, at least three or four times. He was my best friend, my twin soul. I don’t know how to move on. I will, but at the moment I have no idea.”
Following Alice’s accusations, Ioan’s friend and co-worker Amy Douglas – who works as a wardrobe assistant on Harrow – hit back at claims that Ioan and Bianca had a three-year affair.
The Harrow crew member said the lovebirds had zero contact with one another until they started filming the third series of the hit drama last year.
She also alleged that Alice threatened to divorce Ioan during the final week of filming.
“Don’t buy into the lies you are being fed,” she said on Twitter.
“I saw what Alice was doing to Ioan in the last week of filming, threatening a divorce if he didn’t go home. I saw how upset he was.”
Alice and Ioan fell head over heels for one another on the set of 102 Dalmatians back in 2000.
Six years later, the pair got engaged and they then tied the knot in an intimate ceremony in Mexico in 2007.
Following several years of blissful marriage, the pair’s relationship came to a very public end in January when Alice revealed that her marriage was over on social media.
At the time, she tweeted: “Sad news. My beloved husband/soulmate of 20 years, Ioan Gruffudd, has announced he is to leave his family, starting next week.
“Me and our young daughters are very confused and sad. We haven’t been given a reason except that he ‘no longer loves me’. I’m so sorry.”
The Mirror has reached out to Ioan and Tamzin’s representatives for comment on this story.Internet Explorer Channel Network