Mike looked dapper in a grey suit along with a striped shirt and a blue tie. He added a pair of black shiny shoes to the ensemble.
The former rugby player's wife Zara, 41, matched both her husband and daughter as she wore a long grey coat, a high-neck black top and burgundy fascinator, a handbag and high-heeled shoes.
Dressed in a sweet burgundy coat, Mike and Zara's daughter Lena, four, stole the show as she held hands with both her parents and walked alongside them.
The couple also share eight-year-old Mia and Lucas, one.
Mike, Zara and Lena were the last to walk towards St Mary Magdalene Church as the former rugby player flashed a smile at his wife's family.
It comes after Mike dodged an "awkward" question about his wife's cousin Prince Harry earlier this week.
Speaking on his podcast, The Good, The Bad and The Rugby, Mike was asked about Christmas and the past 12 months and made reference to The Queen's death and King Charles ascending to the throne.
He said: " There's been a lot of change."
It prompted his co-star, fellow former rugby player James Haskell to say: "King's speech?", referring to this year being the first that Charles will deliver the monarch's annual Christmas message.
Mike added: "There will be a lot of first so, yes go and watch it."
And cheekily James asked while giggling: "It is going to be pin the tail on Harry, like running him around and trying to..? Smash the pinata?"
However, a video of the exchange saw Mike look unimpressed with the question and he moved on swiftly and told his co-stars: "You know when I said when I went in the jungle?"
After his time in the jungle, Mike revealed how he dodged questions about the royal family while in the I'm A Celeb jungle.
Discussing the show on his podcast, he revealed: "You don't want to upset anyone.
"I spoke to the Prince of Wales about it and he said 'Great, go have fun'."
Mike went on to touch on his discussions of the Royals with his I’m A Celebrity campmates, admitting to 'cutting conversations short' when the subject arose.
Mike became the first member of the royal family to head into the I'm A Celebrity... Get Me Out Of Here!
He was the eighth star to leave the jungle in the latest series – which saw Jill Scott crowned Queen of the Jungle.
Speaking about his experience afterwards, he revealed: "Before I went in, I imagined the worst case scenario and mine is pretty bad. I was always like, 'You know that's going to happen so let's not it affect you'."