"I can't think about it too much because I start to miss it.
Brand filed for divorce on December 30, 2011, citing irreconcilable differences.
Brand's relationship with Gallacher has been notably different from the one he shared with ex-wife Katy Perry, whom he would appear alongside on the red carpet.
Though Perry and Brand split in 2011, just 14 months after they wed in Rajasthan, India, their divorce has remained a tabloid topic for years.
She appeared to be employed at the Moral Fox restaurant, where she regularly tweeted updates.
Gallacher also helped with the opening of Electric Diner, a posh restaurant for the Soho House Group.