Rumor has it...
Word is...
They say...
The rumor is going around...
There's some buzz going around...
1. Rumor has it Mike is a homosexual and his marriage is only a cover-up. / Ходят слухи, что Майк гомосексуалист, а его брак только прикрытие.
2. There's a lot of rumors going around about me. / Про меня ходит много слухов.
3. Word is he lost his business and wanted to kill himself. / Ходят слухи, что он потерял свой бизнес и хотел покончить жизнь самоубийством.