Oh boy! Rachel McAdams has given birth to a baby boy with boyfriend, Jamie Linden, and it may just be the best kept secret since Kylie Jenner gave birth to Stormi. Talk around the happy news has been kept quite hush hush, but Hollywood Pipeline has released a rather grainy image of the couple taking a walk with the baby in Jamie’s arms. Via Hollywood Pipeline According to the site, Rachel and Jamie were overheard at lunch talking about the bub, saying what a “good sleeper he is̶