10 celebrity pairs that you probably didn't know were in-laws

Emily Blunt and Stanley Tucci are in-laws.Jason Merritt/Getty Images

• While celebrity couples are well-known to the public, famous in-laws receive far less attention.
• Some of the pairings, including Nicole Richie and Cameron Diaz, have flourishing relationships and regularly spend time together.
• Other celebrity in-laws seem to have limited connection, like Mark Wahlberg and Jenny McCarthy.
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It's hard enough to keep track of Hollywood's famous couples, which means it's nearly impossible to remember which celebrities are in-laws.

Nicole Richie and Cameron Diaz, for example, are married to brothers Joel and Benji Madden, making them sisters-in-law. And Stanley Tucci exchanged vows with Felicity Blunt after they met at Emily Blunt's wedding.

Here are 10 pairs of celebrity in-laws that you might not know about.