diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
index c53e84d9ab22..f35be3de9b1b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
@@ -656,7 +656,12 @@ case class Cast(child: Expression, dataType: DataType)
   private[this] def castToIntervalCode(from: DataType): CastFunction = from match {
     case StringType =>
       (c, evPrim, evNull) =>
-        s"$evPrim = CalendarInterval.fromString($c.toString());"
+        s"""$evPrim = CalendarInterval.fromString($c.toString());
+           if(${evPrim} == null) {
+             ${evNull} = true;
+           }
+         """.stripMargin
+
   }
 
   private[this] def decimalToTimestampCode(d: String): String =
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
index ab77a764483e..9a6aaffc7ef2 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
@@ -764,6 +764,7 @@ class CastSuite extends SparkFunSuite with ExpressionEvalHelper {
   test("cast between string and interval") {
     import org.apache.spark.unsafe.types.CalendarInterval
 
+    checkEvaluation(Cast(Literal(""), CalendarIntervalType), null)
     checkEvaluation(Cast(Literal("interval -3 month 7 hours"), CalendarIntervalType),
       new CalendarInterval(-3, 7 * CalendarInterval.MICROS_PER_HOUR))
     checkEvaluation(Cast(Literal.create(