On an invitation card...

Mr and Mrs Jack Anderson

works very well. It includes both Mr. Jack Anderson and his wife.

The beauty of this style is, I need not know Jack's wife's name. Here, Jack is my friend and I know him.

Personally, I'm quite terrible at names. So, what if I know Julie Watson but don't remember her husband's name? I don't want to sound ignorant and ask Julie about her husband's name (it's embarrassing too!).

I'm now stuck. While writing Mr & Mrs Jack Anderson includes his wife, is there such a way that I can write Julie's name and her husband is included automatically?

What are the possible ways to address Julie and include her husband's name as well?

Mrs & Mr Julie Watson

(Julie's second name after marriage is Watson; it's not her maiden surname. Also, I'm inviting her husband just because he's her husband. He's not a friend of mine! Kinda formality.)

works...?

Please mind that I don't want to include all the members (i.e. her in-laws). Or else 'Watsons'' would have worked.

Answers from all cultures are welcomed.