As the fledgling romance rumored to be going on between Drake and Serena Williams builds up momentum, the new couple has passed on very important hurdle: getting her friends' stamp of approval. "Things are heating up with the duo, and all of Serena's friends approve of the pair," a source tells E! News

RELATED: Drake and Serena, sitting in Cincinnati, K-I-S-S-I-N-G

So what is it that her pals like so much about the Canadian rapper and former child star? For one thing, he is "a true gentleman and is very supportive," the source notes. And he also shares Williams' penchant for privacy, hence their attempts to keep their fling under wraps for as long as they could. "They are both private people when it comes to their personal lives." Well, so much for that. 

Follow Ned Ehrbar on Twitter: @nedrick