Can both "having" and "they had" be used in the following sentence?

[nohabloingleas]

"I was really happy when they announced ....... decided to get married"

 

[Piscean]

No. Use 'they had'.

In future please put your question in the post itself, not just in the subject line.

 

[emsr2d2]

In addition to Piscean's excellent advice, note that your question should not have appeared in the title at all. A perfect title for this thread would have been "I was really happy when they announced ... decided to get married".