‘Cause, baby, now they’ve got bad blood.

Blake Lively reportedly hasn’t congratulated Taylor Swift on her engagement to Travis Kelce after their longtime friendship fell apart this year.

“Blake didn’t reach out [following the engagement announcement] and isn’t going to,” a source told the Daily Mail Wednesday.

“This isn’t the time. What would be the point of reaching out now? It really makes no sense. [Lively] has bigger fish to fry,” the insider added, referencing the actress’s ongoing legal drama with Justin Baldoni.

The outlet reported that the “Gossip Girl” alum “doesn’t talk about Taylor at all” and doesn’t ponder on their doomed friendship.

“This is something that we would’ve talked about in the past, like what was going to happen, if she was going to be in the wedding, what that would look like. All of that. But now, it’s just silence,” the source added.

“There’s no ‘will she or won’t she’ about Blake being in the wedding, because she just won’t. She knows that, and I don’t think she particularly wants to talk about that.”

The source also claimed that Lively, who celebrated her 38th birthday on Monday, isn’t “sitting home obsessing about Taylor getting engaged” because “she’s got her own life to focus on.”

Page Six has reached out to Lively’s rep for comment but did not immediately hear back.

Lively and Swift’s friendship imploded earlier this year when the singer was dragged into Lively’s legal battle with her “It Ends With Us” co-star.

In January, Baldoni filed a $400 million lawsuit against Lively, her husband, Ryan Reynolds, and their publicist, alleging defamation, extortion and more. (The lawsuit was dismissed in June.)

In the docs, Baldoni shared texts from Lively, showing a discussion they had about the “Bad Blood” singer.

“I happen to have a few dragons. For better or worse, but usually for better,” the actress’s alleged text read.

“Because my dragons also protect those I fight for. So really we all benefit from those gorgeous monsters of mine. [Smiley-face emoji] you will too, I can promise you.”

In another alleged text from Lively, the “A Simple Favor” star referred to Swift, 35, and Reynolds, 48, as her “most trusted partners.” 

In May, Swift was issued a subpoena to appear in court as a witness in the actors’ ongoing legal feud.

A source close to the pop star told People about Lively and Swift, “Their friendship has halted. Taylor wants no part in this drama.”

Another insider claimed that Swift and Lively were “taking some space” from each other.

Later that month, Baldoni, 41, dropped the “Cruel Summer” singer’s subpoena.

Despite Swift’s friendship drama with Lively, she is on cloud nine with her new fiancé.

On Tuesday, the Grammy winner and the Kansas City Chiefs star, also 35, announced their engagement.

“Your English teacher and your gym teacher are getting married 🧨,” the couple captioned a carousel on Instagram.