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We were pretty excited when we heard the news that Megan Fox and Machine Gun Kelly were officially engaged last month! But one person who didn’t feel the same way was Megan’s ex-husband – who is also the father to her three children – Brian Austin Green.

Despite being in a seemingly happy relationship of his own (he has been dating Dancing with the Stars pro, Sharna Burgess for over a year!) we kind of had a feeling that the 48-year-old actor wouldn’t take the news that his wife of almost ten years was getting married again too well!

According to an insider, the 90210 alum “couldn’t care less” about his ex-wife taking the next steps with the 31-year-old rapper – real name Colson Baker – which the internet suspects is code for “he isn’t happy about it.” We don’t think he sent the newly-engaged couple any congratulatory flowers or gift baskets, put it that way!

“Brian doesn’t have any lingering romantic feelings for Megan or any anger,” the insider told Entertainment Tonight.

“Brian is happy for her, but it really isn’t affecting him one way or the other. There’s no bad blood or ill will between them at this point.”

The insider concluded by saying that he “mainly feels indifferent” towards the engagement, and their three children – Noah Shannon, nine, Bodhi Ransom, seven, and Journey River, five – are still his top priority, so he “is just glad [he and Megan] are co-parenting well together.”

Hmm… do we believe that he is truly indifferent?